The Collector's Guide to Pocket Calculators lists over 1,500 models of early pocket calculators from over 220 companies and provides an excellent source of information on early hand-held calculators. However, since it was published further models have come to light and are listed here.
If you have an early pocket calculator (from the 1970s with LED, vacuum fluorescent, discharge, or
early LCD display, and battery powered) which is not in The Collector's Guide, please email the details as in the list below for inclusion here.
Details for each calculator are required in the format used in the book, and below:
Manufacturer or Trading Company, Model Name or Number (there may be more than one), Functions, Display Type, Battery type (and if
rechargeable), Size, Country of Manufacture, any Interesting Features.
A small frontal photograph (jpeg format, about 600 pixels max dimension) of each would be useful and will be included with the details if of good quality.
Please email with details.
New Calculators
Latest Update - latest additions have the date added.
Displays are 8-digits unless described otherwise.
Go to T U V W X Y Z
T
T 600 (May just be the model number)
- T 600, 4-function, red LED, 9v PP3 rep. batt., Malaysia.
T Research (Italian company?)
- 887D, 4-function, %, memory, red LED, 9v PP3 rep. batt., 76x146x24mm / 3.0x5.75x0.9", "Fabbricato Negli Stati Unitig" [Made in the USA], (similar to Commodore 887D). Photo.
Tabulex (Euro-market company. May have had a connection with Hanimex.)
- 666, 4-function, red LED, 4-AA rep. batt., 81x172x23mm / 3.2x6.8x0.9", Hong Kong, has membrane keyboard, c1973, similar to Prinztronic C15. Photo.
- 849, 4-function, red LED, Hong Kong. Jan. 24.
- 880, listed in book.
- alpha, 4 function, %, red LED, similar to Prinztronic Mini.
- delta, listed in book.
- gamma, 4 function, %, memory, red LED, 4- AAA rep batt, 2.2x4.75", Hong Kong, similar to Prinztronic M. Photo.
- P86, 4-function, %, red LED, 4-AA rep. batt.
Taktile (Made in England by Advanced Telecommunications Equipment Ltd. (ATE).)
- 1200, 4-function, red LED, membrane keyboard, same as Shibuya Triton 1200. Featured on British calculator site.
- 2001M, 4-function, %, memory, red LED, membrane keyboard, resembles Triton models. Featured on British calculator site. Photo.
Tamaya (Japanese scientific instrument maker)
Tandy (Tandy Corporation was the parent company of Radio Shack. Calculators were
sold under the Tandy name in Europe and Australia. See the corresponding calculator under Radio Shack.) The following models are known labelled 'Tandy'.
- EC-201, 4-function, %, memory, red LED.
- EC-330, 4-function, %, square-root, memory, red LED, PP3 rep batt, 68x133x23mm / 2.7x5.2x0.9", Hong Kong. Photo
.
- EC-380, 4-function, %, square-root, memory, blue VFD, 2-AA rep. batt., Japan.
TATEX
- TATEX, 4-function, %, VFD.
TATRON
- TATRON, 4-function, red LED, 9v PP3 rep. batt.
Tatung (Taiwanese electrical and electronics company)
- 806, 4-function, %, memory, red LED, 4- AA rep batt, 78x122x30mm / 3.1x4.8x1.2", Taiwan. Photo
, inside.
TC (probably not the name of the company. If you have any information please get in touch)
- TC-8M, 4-function, %, memory, green VFD. Photo.
TEAL (T.E.A.L. stands for Tokyo Electron Applications Laboratory, of Tokyo, Japan, which made and sold calculators under the TEAL
name. TEAL Industries Inc., of Carson, California, was the U.S. subsidiary. For more information see the Calculator Companies section).
- 08L Jnzadi, 4-function, blue VFD, 4-AA rep. batt., Japan. Jan. 24.
- 8, 4-function, red LED, sealed batt, 3.0x5.0", interesting case design, same case as Apollo II (NRC-9270), Japan.
- 110PD, listed in book.
- 806, listed in book.
- 813 4-funct, mem, %, sq rt, green fluor, 4-AA rep batt, 3.5x5.5", same case as Tokyo Electronic Applications Lab Technipet 813, Japan. Photo.
- 817, listed in book.
- 826, listed in book.
- K-80M, 4 function, 8 digits orange gas discharge in separate tubes, 4-C rep batt, 4.8x8.6", switches for constant and decimal place, battery meter, date unknown, country of
manufacture not stated (Japan ?), similar to Xonex model. Photo.
- LE-8, 4 function, red LED, 6-AA rep batt, 70x142x34mm / 2.75x5.6x1.3", Japan, identical to TEALTRONIC LE-8. Photo.
- LE-8 President, 4 function, red LED, 6-AA rep batt, 74x142x31mm / 2.9x5.6x1.2", c1972, Japan, also found labelled as Geller Teal LE-8. Photo.
- SR81 aka 9R81, 4-function, %, square root, square, reciprocal, green VFD, 2-AA rep. batt., Japan.
- SR82, listed in book.
- SR85, listed in book.
- TECNIPET (aka 08L), 4-function, green VFD, 4-AA rep. batt., Japan.
- Technipet MIIA, 4-function, memory, green VFD, 4-AA rep. batt., Japan.
- Technipet TL813, listed in book.
- Tl-8000, 4-function, green VFD, 4-AA rep. batt., Japan.
TEALTRONIC (British marketing company which specialised in TEAL calculators, High Road, London N12)
- 4519, 4-function, %, memory, sq. rt., similar to Craig 4519. Photo. Featured on British calculator site.
- K-80M (type 1), 4 function, green VFD tubes, 4-C rep batt, 121x218x38mm / 4.8x8.6x1.5", switches for constant and decimal place,
country of manufacture not stated (Japan ?), similar to Teal K-80M but without the battery meter. Photo. Featured on British calculator site.
- K-80M (type 2), similar to type 1 but in a stylish silver-coloured case. Photo. Featured
on British calculator site.
- LE-8, 4 funct, red LED, 6-AA rech batt, 70x142x30mm / 2.75x5.6x1.2", c1973, identical to TEAL LE-8. Photo. Featured on British calculator site.
- SM-8, 4 funct, %, mem, green VFD, 4-AA rech batt, 71x155x33mm / 2.8x6.1x1.3", c1973. Photo
. Featured on British calculator site.
- TIC-63, 4-function, %, square root, PI, memory, blue VFD, 4-AA rep. batt., Japan. Jan. 24.
- TIC-85, scientific, blue VFD, 4-AA rep. batt., Japan. Jan. 24.
- TIC-86, scientific, blue VFD, 3-AA rep. batt., Japan.
- TEM-28, listed in book.
- TEM-38, listed in book.
- TEM-48, listed in book.
TEC (Taihan Electric Wire Co., Ltd., Korea)
- TECCAL MINI-806, 4 function, 8 digit ref LED, Korea. Photo.
TECHNICA
- 230MR, 4-function, %, square root, memory, green VFD, 2-AA rep. batt., Japan.
Technico
- 44SR, 4-function, %, square root, memory, green VFD.
- 55SR, scientific, green VFD, 3-AA rep. batt.
- 77 SR, scientific, red LED, 3-AA rep. batt.
- Pocket Mini aka 6SL, 4 function, memory, %, red LED, PP3 rep. batt., 60x100x21mm / 4.8x8.6x0.8", country of manufacture
unknown. Photo.
tecnosonic
- 110, scientific, 8-digits mantissa & 2-digits exponent green VFD, similar to Tohotronic Rogers F-6 and Decimo Vatman Scientific. Photo.
- 481, 4-function, %, square root, green VFD.
- 710, scientific, green VFD.
- E81, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
TECO (Tongyuan Electric and Machinery Co., Ltd., Taiwan
- TE-023, 4-function, red LED, PP3 rep batt, 80x127x33mm / 3.1x5.0x1.3", c1973, Taiwan. Photo, inside, uses the Mostek MK5010P early "calculator-on-a-chip".
- TE 8053, 4-function, red LED, 4-AA rep. batt.
tee (TRANS EUROPEAN ELECTRONICS)
- 200, 4 function, %, square root, pi, green VFD, 2-AA rep. batt., Japan.
- 402, 4 function, %, square root, square, reciprocal, memory, green VFD, 2-AA rep. batt., Japan.
TEKNIKA GENERAL See General
TEKTRON
- SLIDE RULE SUPER THIN 232, 4-function, %, square root, square, reciprocal, memory, blue VFD, sealed rechargeable. batt., Taiwan.
TEL
- Elektron Mark I, 4 function, %, 8 digit VFD tubes, 88x151x30mm / 3.5x5.9x1.2" c1973, Japan. Photo
, inside.
Tel-Exec
- Tel-Exec, 4 function, %, 4-N rep. batt., Japan, similar to Pico PA-80D.
TENKO
- ECL-12M, 4 function, %, square root, 2 memories, 12-digits separate VFD tubes, 4-C rep. batt., 119x195x50mm / 4.7x7.7x2.0", Japan, may carry a stuck on Busicom label since like this example marketed by Broughtons of Bristol, UK. Photo, inside.
- IAJ-122M, looks similar to ECL-12M. Jan. 24.
TERRAIN Drain (Unknown company)
- TERRAIN Drain, 4-function, %, blue VFD, re-badged Casio Pocket 8S. Jan. 24.
Texas Instruments (USA manufacturer) (See Larry Gilbert's article "Texas Instruments
Calculators: 1972 - 1979 How rare are they?" on this site. There are details of all vintage Texas Instruments calculators at www.datamath.org)
- Able-IV, listed in book.
- Business Analyst aka TI Business Analyst, listed in book.
- Business Analyst I aka TI Business Analyst I, listed in book.
- Citation, see Western Auto.
- Concept I, listed in book.
- Concept II, listed in book.
- Exactra 19 aka EX-19, listed in book.
- Exactra 20 aka TI-20 and EX-20, listed in book.
- Exactra 21 aka EX-21, listed in book.
- Exactra 22 aka EX-22, listed in book.
- Lady 1200, listed in book.
- Little Professor, listed in book.
- MBA, listed in book.
- Minimath 4-funct, early LCD, sealed batt, 3.0x5.5", made in summer 1972, apparently never commercially sold due to technical and manufacturing problems, USA. Photo.
- Money Manager, listed in book.
- Mr. Challenger, listed in book.
- Programmer, listed in book. Photo. Featured in the Non-decimal Calculator Section.
- REC-20, Real Estate calculator, based on TI-58 with the REC-20 module.
- Spelling B, listed in book.
- Studio 29, 4-function, %, square root, square, reciprocal, pi, memory, red LED, Italy.
- SR-10, listed in book. Photo. Featured calculator.
- SR-11, listed in book.
- SR-16, listed in book.
- SR-16 II, listed in book.
- SR-22, listed in book.
- SR-40, listed in book. Photo.
- SR-50, listed in book.
- SR-50A, listed in book. Photo.
- SR-51, listed in book. Photo.
- SR-51A, listed in book. Photo.
- SR-51-II, listed in book. Photo.
- SR-52, listed in book.
- SR-56 Programmable, listed in book.
- T-1220, listed in book.
- T-1225, listed in book. Photo.
- Tax Planner aka WG&G, listed in book.
- TI-20, listed in book.
- TI-30, listed in book. Featured calculator.
- TI-41, European model number of the Business Analyst. Photo.
- TI-45, scientific, VFD, European model. Photo.
- TI-51-III, listed in book. Photo.
- TI-55, listed in book.
- TI-57, listed in book. Photo.
- TI-58, listed in book. Featured calculator.
- TI-58C, listed in book.
- TI-59, listed in book.
- TI-76 "THE SPIRIT of '76, listed in book, made to celebrate USA bicentennial in 1976. Photo with a '76' transistor radio
.
- TI-150, listed in book.
- TI-1000, listed in book.
- TI-1025, listed in book.
- TI-1050, listed in book. Photo.
- TI-1200, listed in book. Photo.
- TI-1205, listed in book.
- TI-1220, listed in book.
- TI-1225, actually T-1225, listed in book. Photo.
- TI-1250, listed in book. Photo.
- TI-1265, listed in book. Photo.
- TI-1270, listed in book.
- TI-1400, listed in book.
- TI-1450, listed in book.
- TI-1500, listed in book.
- TI-1600, listed in book.
- TI-1650, listed in book.
- TI-1680, listed in book.
- TI-2500 aka Datamath, listed in book. Featured calculator.
- TI-2500B, listed in book.
- TI-2500-II aka Datamath II, listed in book. Featured calculator.
- TI-2510, listed in book. Featured calculator.
- TI-2511, similar to TI-2500B. Featured calculator.
- TI-2550, listed in book. Photo.
- TI-2550 II, listed in book.
- TI-2550 III, listed in book.
- TI-2550-IV, 4-function, %, memory, "Playback" mode (to enable the steps made in a calculation to be checked and edited), VFD, rechargeable battery pack,
81x148x32mm / 3.2x5.8x1.25", Italy and Turkey. Photo.
- TI-5025, listed in book.
- TI-5050, listed in book.
- TI-5050M, listed in book. Photo.
- Texas Instruments Navigatronic, navigation calculator based on a TI-58 Programmable calculator fitted with a Navigation Module and supplied in a wooden case. Featured calculator.
- USMC Harrier VSTOL/REST Calculator, TI-58 calculator with "Harrier" program module for Vertical or Short Takeoff and Landing (V/STOL) and Range, Endurance, Speed,
and Time (REST), Made for MCDONNEL AIRCRAFT COMPANY. Has a strap (for going round thigh ?) attached to the back by a Velcro pad. Featured calculator.
- Wiz-a-Tron, listed in book.
- Correction to book --- TI-58/TI-58C In the book these models are listed as having a programmable card reader. This is not true. Only the TI-59 had the reader.
Texatron
- Texatron, listed in book.
Texet
- 1, 4-function, red LED, 6- AA rep batt, 79x151x38mm / 3.1x5.9x1.5", c1972. Featured calculator
.
- 82M-D, 4-function, %, green VFD.
- 800M, 4-function, %, memory, red LED, 9v rep batt, 2.75x5.25", Hong Kong. Similar to Voesa 3000. Photo. See also the "Standard Type 1 Calculator" page. Featured on British calculator site
.
- 800PR, 4-function, %, green VFD.
- 801M, 4-function, %, memory, green VFD, 2-AA rep. batt., Japan.
- 803PM, 4-function, %, memory, square root, green VFD, 2-AA rep. batt., Japan. Photo.
- 880, listed in book. Photo. Featured on British calculator site.
- 880A, 4-function, %, memory, X/Y, red LED, 9v rep batt, 3.0x5.4", ~1980. Designated 880 on calculator but 880A in the instruction manual - has only 4 buttons in top row,
whereas the 880 has 5. Photo. Featured on British calculator site
.
- 1200 STUDENT, 4 function, %, memory, square root, green fluorescent, 2- AA rep batt, 2.9x5.25", Hong Kong. Photo. Featured on British calculator site.
- 1500, listed in book. Photo. Featured on British calculator site.
- 1800, 4-function, %, sq rt, green VFD, 9v rep batt, 77x137x24mm / 3.0x5.4x0.9". Photo. Featured on British calculator site.
- Gyro-1, 4 function, %, green VFD, 2-AA rep. batt., made by Toho Tsusho Co., Ltd. Japan, bears a family resemblance to the Toho Gyro-3. Photo. Featured on British calculator site.
- L0831T, 4 function, %, memory, red LED, PP3 rep. batt., Singapore. Photo. Featured on British calculator site.
- Pocket-8, 4-function, %, sq rt, green VFD, Japan.
- Pocket-8M, 4 function, %, memory, green VFD, 2-AA rep. batt., 79x140x23mm / 3.1x5.5x0.9", Japan. Photo
. Featured on British calculator site.
- Pocket-8MR, 4 function, %, memory, square root, green VFD, 2-AA rep. batt., 79x140x23mm / 3.1x5.5x0.9", Japan. Photo. Featured on British calculator site.
- SCIENTIFIC 2001, Scientific, red LED, 9v rep batt, 3.0x5.7", Hong Kong, IC date coded 1979. Photo
. Featured on British calculator site.
- Secretary, 4-functions, %, memory, square root, 12 digits green VFD, 3-AA rep batt, 110x136x46mm / 4.3x5.4x1.8", Japan. Photo. Featured on British calculator site
.
- Student, semi-scinetific functions, green VFD, 1-AA rep batt, 75x121x19mm / 3.0x4.8x0.75", Korea. Photo. Featured on British calculator site.
- Trader, four-function, %, memory, square root, green VFD, 2-AA rep batt, 81x132x20mm / 3.2x5.2x0.8", Japan. Photo. Featured on British calculator site.
TG&Y
- 19-0108, 4-function, %, square root, memory, VFD, 2-AA rep. batt.
Tik-Tron
- 108, 4-function, %, square root, green VFD, 2-AA rep. batt., Japan.
- 112S, 4-function, %, square root, square, reciprocal, memory, green VFD, 2-AA rep. batt., Japan.
Timex
- Timemate aka 90002, 4-func, %, memory, square root, time & alarm, 8-dig & time yellow LCD, 4x mercury button
cells, 71x133x11mm / 2.8x5.25x0.5", Japan. Photo.
TKC (Tokai Communication Industry Co. Ltd., Japan)
- M-801A, 4-function, red LED, 4-N rep. batt., Japan.
TKS 2002 (TKS Corporation, Los Angeles, California, U.S.A.)
- 810N, listed in book.
- 812N, listed in book.
- 814M, 4-function, %, memory, red LED, 3-AA rep. batt., 77x138x20mm / 3.1x5.4x0.8", c1974, Korea. Photo
, inside.
- 830D, 4-function, %, square root, green VFD, 3-AA rep. batt., Korea.
- 835MD, listed in book.
Tohotronic (Toho Tsusho Co. Ltd., Japan)
- CENSOR-1, 4-function, %, green VFD, 2-AA rep. batt., Japan.
- Sensor 3. Photo.
- Gyro-1, 4-function, green VFD, Japan.
- Gyro-3, 4-function, %, memory, sq. rt., green VFD, 2-AA rep batt, 80x138x25mm / 3.2x5.4x1", Japan. Photo.
- Roger 80, 4-function, %, blue VFD, 4-AA rep. batt., Japan.
- Roger F-1, listed in book. Photo.
- Roger F-4, 4-function, %, square root, memory, VFD.
- Roger F-5, listed in book. Photo.
- Roger F-6, scientific, VFD, Japan.
Tokai (TOKAI COMMUNICATION INDUSTRY CO. LTD)
- M-801, 4 function, red LED, 4-N rep. batt., 2.1x3.2", tiny calculator with same case as Computech M-801, Japan.
Tokatron
- Tokatron, 4 function, red LED, 4-AA rep. batt., similar to Craig 4511A.
- Tokatron, 4 function, %, memory, green VFD, Japan. Jan. 24.
Toko
Tokyo Electron Applications Laboratory - See TEAL
Tom Thumb
- "Tom Thumb", 4-function, red LED, 3.5x2x1".
Topaz
- 888, 4-function, %, red LED, PP3 rep batt, 68x130x24mm / 2.75x5x1", Hong Kong. Photo.
TOP CREST
- MEMORY, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator.
TOPIA
- LE-806D, 4-function, red LED, 6-AA rep. batt., Japan.
TOPIX
- 810, 4-function, %, square root, 2-AA rep. batt., Japan.
TOP STAR
- K-10LS, 4-function, 10-digits red LED, 6-AA rep. batt., Japan.
Toshiba (Tokyo Shibaura Electric Co. Ltd, Tokyo, Japan. See also calculators under the 'Homeland' label which were marketed by the separate Toshiba Business Machine Co., Ltd., a company in the Toshiba group.)
- BC-0801B, listed in book, the first Toshiba hand-held calculator, 1972. Photo, inside. Featured calculator.
- BC-0804B, listed in book.
- BC-0806B, 4-function, red LED, 4-AA rep. batt., 74x117x36mm / 2.9x4.6x1.4", Japan, has 'clam shell' case lid. Photo, rear.
- BC-0808B, listed in book. Photo.
- BC-601L, 4-function, %, 6-digits blue VFD, 4-AA rep. batt.
- BC-602L, 4-function, %, 6-digits blue VFD, Japan. Photo.
- BC-603L, listed in book.
- BC-812, 4-function, memory, red LED, 4xAA rep. batteries, 84x167x25mm / 3.3x6.6x1.0", Japan, the display is larger than normal. Photo.
- BC-815, listed in book. Photo.
- BC-819, listed in book.
- BC-1010BJ, listed in book.
- BC-1015, listed in book.
- BC-1020PV, 4-function, %, memory, 10 digits, green fluorescent and printer, 3- AA rechargeable batt, 3.1x9.2", Japan.
- BC-1205B, 4-function, red LED, 5-AA rep. batt., battery-level meter, Japan. Jan. 24.
- BC-1265B, 4-function, %, square root, memory, 12-digits VFD, 4-AA rep. batt., Japan.
- BC-8010 TOSCAL, 4-function, %, red LED, 9v PP3 rep. batt., Japan. Jan. 24.
- BC-8012, 4-function, %, sq. rt., green VFD, 4-AA rep. batt., Japan.
- BC-8013, listed in book.
- BC-8016, listed in book.
- BC-8018, listed in book.
- BC-8018B, listed in book.
- BC-8110, 4-function, %, square root, memory, blue VFD.
- BC-8111, listed in book.
- BC-8111B, listed in book. Photo.
- BC-8112SR, 4-function, %, memory, sq rt., sq., reciprocal, VFD, 2-AA rep. batt., Japan. Photo
.
- BC-8115S 'Ranking Calculator', 4-function, %, sq rt, memory, blue VFD, 2-AA rep. batt., Japan. Jan. 23.
- SC-6100, listed in book.
- SC-7100, listed in book.
- SC-7400, scientific, blue VFD, 4-AA rep. batt., Japan.
- SC-7500, scientific, blue VFD, 4-AA rep. batt., Japan.
TOSMAC
- TC-820DX, 4-function, %, square root, reciprocal, memory, red LED, 2-AA rep. batt.
totSonic
- 38S, scientific, memory, green VFD, 4-AA rep. batt.
TOVSON
- SR-14, 4-function, %, square root, memory, green VFD.
TRANSIMPEX
- SR-10, 4-function, %, square root, red LED, 9v PP3 rep. batt.
Transonic (we have no information about this company. If you can help please get in touch.)
- C15, 4-function, 6 digits red LED, 4-AA rep. batt., 81x171x22mm / 3.2x6.7x0.9", c1973, Hong Kong. Photo
, inside.
- mini, 4-function, %, red LED, 4-AAA rep. batt. (similar to Prinztronic mini). Photo
.
TRAVELLERS
trend
- II, 4-function, %, memory, red LED, Hong Kong.
Tricom
Tri-Star
- 830MD, 4-functions, %, memory, sqare root, green VFD, 1-AA rep. batt., 74x117x19mm / 2.9x4.6x0.75", Korea, similar to Silver Reed 81.
Photo.
Triton - Triton was a registered trademark of Radofin Electronic. See Radofin. Some Triton
models are similar to Taktile models.
Triumph (European market calculator, same company as Adler, many models the same, some sold as "Triumph-Adler")
- 60, listed in book.
- 80 aka EC 10, 4-function, red LED, sealed rech. batt.
- 80C, listed in book. Photo.
- 80S, 4 function, %, square root, blue VFD.
- 81, same as Anita 811. Photo.
- 81S, listed in book.
- 81SN, 4 function, %, memory, square root, VFD, 3-AAA rep batt, 73x134x15mm / 2.9x5.3x0.6", Japan. Photo
.
- 82M, listed in book.
- 88T, listed in book.
- 88TS aka EC42, scientific, green VFD, 2-AA rep batt, thin, aluminum front, 3.0x5.75".
- 109 T, scientific, 8-digits mantissa & 2-digits exponent green VFD, 4-AA rep. batt.
- 121C, 4-function, %, square root, memory, green VFD, 3-AA rep. batt. Japan, back slides up to replace batteries.
- Lady, listed in book.
- Sir, listed in book.
TRONICA
- 3000, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type 1' calculator.
TRQ (Spanish manufacturer)
- F, blue VFD, Spain.
- F/80, 4-function, %, red LED.
- F-81, 4-function, %, memory, red LED, 3-AA rep batt., Spain. Jan. 24.
- F-85, 4-function, %, memory, red LED, 4-AA rep batt.
- F-95 aka laurita, 4-function, %, square root, blue VFD, 2-AA rep batt.
- F1000S, scientific, 12-digits red LED.
- F-1001, scientific, VFD, 2-AA rep batt, 2.75x5.25", dated 1-79, Spain.
TRS (Tvornica Računskih Strojeva, translates to Computing Machinery Factory. Croatia, ex-Yugoslavia)
- 529, scientific, red LED, 4-AA rep. batt., 142x75x31mm / 5.6x3.0x1.2", Yugoslavia.
- POLAR, scientific, 8-digits mantissa & 2-digits green VFD, 4-AA rep. batt., Yugoslavia.
Tryom (U.S. company)
TSI (Telemetry Systems Inc.) (U.S. company)
T Research
TWS (TWS Electronics, South Beloit, Illinois, U.S.A.)
- METRIC CONVERTER, 4-function, %, metric conversion, memory, similar to MITS 941M.
U
UDM (see Universal Data Machine)
UIT
Unico
(The instruction booklet of H-803A says "Wah Chang Group of Companies. Manufactured by United Electronic Engineering Corp." Wah Chang Corporation is a manufacturing company based in Albany in the U.S. state of Oregon. United Electronic Engineering Corp. is a Singapore company.)
- H-803A, 4-function, red LED, 5-AA rep. batt., 80x147x27mm / 3.1x5.8x1.1", Singapore. Photo.
- H-854, 4-function, memory, red LED, sealed rech. batt., Singapore.
- H-884, 4-function, %, blue VFD, 4-AA rep. batt., Singapore.
- L-0830, 4-function, red LED.
- P 805, 4-function, %, green VFD, AA rep. batt., 72x110x22mm / 2.8x4.3x0.9", Singapore. Photo
.
- R-845, 4-function, %, red LED, 9v PP3 rep. batt., Singapore.
- R-846, listed in book.
- S-0816, scientific, blue VFD, 2-AA rep. batt., Singapore. Jan. 24.
- SR-812, scientific, blue VFD, 4-AA rep. batt., Singapore.
- UNICO, 4-function, %, square root, memory, red LED, 9v PP3 rep. batt., Singapore.
Unicom (U.S. company) (also see Rockwell)
- 102, listed in book. Photo. Featured calculator.
- 103, listed in book. Photo.
- 104+, listed in book. Photo.
- 201, listed in book. Photo.
- 202/SR, listed in book.
- 801, 4-function, VFD in separate tubes, sealed rechargeable batteries, U.S.A., unusual horizontal design with hinge-down support at rear to tilt the calculator forwards.
- 802, listed in book.
Unifive Industries Corporation (Marietta, Georgia, USA).
- 301, (aka The Magic Slate and Data Brain II) listed in
book. Manual for Data Brain II states "Made especially for World Book Encyclopedia", $59.95 in 1974. Similar to the Calfax Data Brain II.
- Magic Slate, 4-functions, %, memoryred LED.
- Mini-Mite I, 4-functions, red LED.
unigran
- mini 8M, 4-function, %, blue VFD, 2-AA rep. batt., Japan.
UniMark (marked Interpur PO Box 2353 Orlando Fla. USA. See also Baltimore UniMark model).
- 805T, 4-function, %, VFD, 4-AA rep. batt., 88x140x25mm / 3.5x5.5x1.0", Japan. Photo
.
- 808T, 4-function, %, square root, green VFD, 4-AA rep. batt., Japan.
- 813T, 4-function, %, square root, memory, green VFD, 4-AA rep. batt., Japan.
Union Carbide (U.S.A. chemical company).
- Union Carbide, 4-function, %, green VFD, 3-AAA rep batt, 50x92x20mm / 2.0x3.6x0.8", Japan, very small, similar to Royal 80K, was probably a promotional item. Photo.
Unisonic
Note: many Unisonics had a number on the front (911L) and a variation number on the back (911L-A). Often there was a difference in the features or keys of the model from another variation of the same basic model number.
- 8PPMD, listed in book.
- 676, 4-functions, 6-digits red LED, 9v PP3 rep. batt., U.S.A. Photo.
- 711, 711-E, listed in book. Photo of 711.
- 728, listed in book.
- 729, 4-function, %.
- 730, listed in book.
- 733, listed in book.
- 737, listed in book.
- 738, listed in book.
- 738SQ, listed in book.
- 739SQ, 4-function, %, memory, sq. rt., blue VFD.
- 740-B, listed in book. Photo.
- 740-D, listed in book.
- 749-A, 4-function, %, sgn chg, square, reciprocal, memory, green VFD, 4-AA rep batt, 3.6x6.0", Japan.
- 757, 4-function, %, memory, green VFD.
- 790R-C, listed in book.
- 790RM-1, listed in book.
- 796-B, listed in book.
- 799, scientific, 8 digit green VFD, 4-AA rep. batt., Japan.
- 811-A, listed in book.
- 811-C, listed in book. Photo.
- 811L, listed in book.
- 911L-A 4-funct, %, 8 digit red LED, 3-AA rep batt, very small, similar to other "911L" models, 2.5x3.75", Japan.
- 811L-B, listed in book.
- 830-A, listed in book.
- 831-A, 4-function, %, square root, green VFD.
- 839 SQ, listed in book.
- 840-C, listed in book.
- 840-E, listed in book.
- 849-A, listed in book.
- 850, listed in book.
- 888, listed in book.
- 890, listed in book.
- 890-A, listed in book. Photo.
- 890-C, listed in book.
- 911-C, listed in book.
- 911L-A, listed in book.
- 911L-B, listed in book.
- 911L-C, listed in book.
- 931-B, listed in book. Photo.
- 931-C, listed in book.
- 940, listed in book. Photo.
- 940-A, listed in book.
- 940-B, listed in book.
- 940-C, listed in book.
- 1011-A, listed in book.
- 1011-B 4-funct, %, sq rt, 8 digit green fluor, 4-AAA rep batt, Japan.
- 1034-D, listed in book.
- 1040-1, listed in book.
- 1040-A, listed in book.
- 1040-C, listed in book.
- 1048-A, listed in book.
- 1048B, 4-function, %, memory, sq rt, sq., reciprocal, blue VFD, 2-AA rep. batt., Taiwan. Jan. 24.
- 1048R, 4-function, %, memory, sq rt, sq., reciprocal, VFD. Photo.
- 1049-A, listed in book.
- 1099-A, listed in book.
- 1111-A, listed in book.
- 1196, listed in book.
- 1212, listed in book.
- 1299R-A, listed in book.
- 1511L
This model is described and illustrated in the book. However there is a second variation that does not use a variation number. This model does not have keys for sign change and X-Y functions. Otherwise, the case, styling, and other functions are the same.
- 1540D, listed in book.
- 1540L, listed in book.
- 1541L, red LED "Standard type 2" calculator.
- 1542L, listed in book.
- 1548, listed in book.
- Casino 7, listed in book.
- CB-14, listed in book.
- Concept Compact "Super Thin", 4-function, %, memory, sq. rt., blue VFD, rechargeable batt.
- MICKEY'S CALCULATOR aka MICKEY MOUSE CALCULATOR aka MC 2030,
4-function, red LED, 9v PP3 rep. batt., Hong Kong.
- MINI CALCULATOR, 4-funct, 6 digit green fluor tubes, 4-AA rep batt, 80x153x40mm (3.1x6x1.6"), Japan. Photo
.
- XL-101, listed in book.
- XL-112, listed in book.
- XL-115, listed in book.
- XL-117, 4-function, %, memory, green VFD & thermal printer, rechargeable batteries.
- Unisonic (no model number visible), 4-function, %, memory, red LED, 4-AA rep. batt., SIngapore.
- Unisonic 21, listed in book.
Unitra Eltra (Polish company)
- BRDA 10U, 4-functions, %, memory, square root, square, red LED, 9v PP3 rep. batt., 145x80x25mm / 5.7x3.1x1.0", Poland, c1977. Photo.
- BRDA 11U, 4-functions, %, memory, square root, red LED, 9v PP3 rep. batt., 145x80x25mm / 5.7x3.1x1.0", Poland, c1977. Photo, inside.
- BRDA 12U, 4-functions, %, memory, square root, square, red LED, 6-AA rep. batt., 156x82x28mm / 6.1x3.2x1.1", Poland. Photo, inside.
- K-174, 4-functions, blue VFD, 5-AA rep. batt., 145x80x25mm / 5.8x3.1x1.0", Poland. Photo
.
- K-174M, 4-functions, %, square root, blue VFD, 5-AA rep. batt., 165x100x44mm / 6.5x3.9x1.7", Poland. Photo.
- K-765, 4-functions, %, memory, red LED, 146x77x25mm / 5.75x3.0x1.0", Poland, c1977, resembles Commodore 897D. Photo.
Unitrex (EIKO Business Machine Co., Ltd., Tokyo, Japan)#
- 8PPMD, listed in book.
- 80F, see MINI HANDY below.
- 80KF, listed in book. Photo.
- 90SC, listed in book.
- 91PM, listed in book.
- 92SR, scientific functions, red Led, 3-AA rep. batt., 153x78x32mm / 6.0x3.1x1.3", made in Korea, marketed by Unitrex of America, 1976. Photo.
- 95SL, listed in book.
- 800D, listed in book.
- 800K, listed in book.
- 800KD, listed in book.
- 800MR, 4 function, %, square root, green VFD, 4-AA rep. batt., Japan.
- 801D, listed in book.
- 801K, listed in book.
- 801ML, 4-function, %, memory, red LED, Hong Kong.
- 801R, listed in book.
- 801MR, listed in book. Photo.
- 803MP, listed in book.
- 901M, listed in book.
- 901MR, listed in book.
- 901PM, listed in book.
- 901R, listed in book.
- 901SR, listed in book.
- 902AS, listed in book.
- 902RM, listed in book.
- 902SL, listed in book.
- 902SN, listed in book.
- 905SL 4-funct, mem, %, sq funct, recip, green fluor, 2AA rep batt, 2.5x5.25", similar case to Radofin 1610, Hong Kong.
- 1000, listed in book.
- 1000M, listed in book.
- 1203, listed in book.
- CB8SL 'Electronic Slide Rule Calculator', listed in book.
- Executron 817D, listed in book.
- Micro 6, listed in book.
- Mini 8, listed in book.
- mini8 M, 4-function, %, red LED, 9v PP3 rep. batt., Japan.
- Mini Calculator, listed in book.
- Mini Handy, listed in book. Photo.
- mini handy 80, 4-function, red LED, 9v PP3 rep. batt., Japan.
- MINI HANDY 80F, financial functions, red LED, 3-AA rep. batt., Japan.
- Mini Handy 80M, listed in book. Photo.
- Mini Handy 80MR, 4-function, %, square root, memory, red LED, 9v PP3 rep. batt., Japan.
- Mini Handy 80R, listed in book.
- Mini Handy 80SR, listed in book.
- mini handy 122
4-funct, red LED display, seperate LED shows "neg" and "bat," 9V rep batt, 2.75x4.75" (7x12 cm), Japan.
- S805, scientific, blue VFD, 2-AA rep. batt., Korea.
- SC 10 'SLIDE RULE', 4-function, %, square root, square, reciprocal, memory, green VFD.
- SC 30, scientific, blue VFD, 3-AA rep. batt., Hong Kong.
- Scientific 21, scientific, memory, green VFD, 2-AA rep. batt., Thailand.
- UC25, 4-function, %, memory, red LED, 9v PP3 rep batt, Hong Kong.
- UC 35, 4-function, %, memory, red LED, 9v PP3 rep batt.
- UC 45, 4-funct, mem, %, sq rt, sgn chg, VFD, 9V rep batt, 3.0x5.25", Hong Kong.
- UC 50, scientific, 8-digits mantissa & 2-digits exponent green VFD, 3-AA rep. batt., Hong Kong.
- UC 75, scientific, 8-digits mantissa & 2-digits exponent green VFD, 9v PP3 rep. batt., Hong Kong.
Unitronic (Unitronic Industria Argentina)
- 8042, 4-function, %, square root, memory, blue VFD, 4-AA rep. batt.
Universal (IEE (Industrial Electronics & Engineering Ltd.), Singapore. European market calculators)
- 35 Mathematician, scientific, red LED, PP3 rep. batt., Singapore, resembles National Semiconductor 4510 Mathematician.
- 101 4-funct, mem, %, 8 digit red LED display, 9V rep batt, 3.0x5.0", all aluminum case, back slides to allow battery change. Photo.
- 202, listed in book. Photo.
- 303, listed in book. Photo.
- 777, 4-function, red LED, 9v PP3 rep. batt.
- 999, 4-function, %, red LED, 9v PP3 rep. batt., Hong Kong.
- Executive, 4-function, %, memory, red LED, 9v PP3 rep. batt.
Universal Data Machine (UDM) (Chicago, U.S.A.)
- 9V9, listed in book.
- EXPONENT VIII, 4-function, red LED, 9v PP3 rep. batt., Korea, Klixon keyboard, "DESIGNED IN U.S.A., ASSEMBLED IN KOREA". Photo, rear.
- TKB001, listed in book. Photo, photo2, inside
- TKB02, 4-function, constant, 8 digits red LED, sealed rechargeable batt. Photo (on right).
Unknown Manufacturer (if you have any information about the manufacturers and model numbers please get in touch)
- Unknown 1, 8 digits green fluor tubes, 4-func, 4-C rep batt, 132x247x42mm / 5.2x9.7x1.7", c1973, large and stylish, chrome plated calculator.
Photo.
- Unknown 2, Photo, Child's Teaching Speaking Calculator. Featured calculator.
- Unknown 3, 4-function, %, 8 digits red LED, tiny calculator with battery pack which plugs directly into the AC supply. Photo, inside showing battery pack. Featured calculator
.
- Unknown 4, scientific, 8 digits red LED, tiny calculator with battery pack which plugs directly into the AC supply. Photo, inside. Featured calculator
.
- TC-8M, 4-function, %, memory, green VFD, manufacturer unknown. Photo.
Unser Favorit (European market calculator)
- 303 4-funct, sq funct, recip, %, chg sgn, green fluor, 3.0x5.0" (74x128 mm), similar case to Mannics 303.
- 307 sci-funct, green fluor, 3.0x5.0" (7.4x12.8 cm), similar case to Mannics 303.
Uranus
- Calculator Watch, listed in book.
U-Tac
- TC-8, 4-function, orange gas-discharge, 4-C rep. batt., Japan, battery-level meter. Photo.
V
VAICA
- VAICA Unknown model number, 4-function, %, red LED, 9v PP3 rep. batt., Hong Kong.
Vanguard (Made in Spain by Cahué Industrial S.A., Barcelona)
- H 807, 4-function, %, red LED, Spain.
- X-800 aka 03 PA, 4-function, red LED, 6-AA rep. batt., Spain.
- X-802, listed in book. Photo 1, Photo 2
.
- X-805 aka 17 PA, 4-function, memory, red LED, Spain.
- X-810 aka 2 PA, 4-function, red LED, Spain.
- X-821, 4-function, %, square root, square, reciprocal, red LED.
- Polaris Eletronic "shirt pocket CALCULATOR" aka 10 PA, 4-function, %, memory, red LED, 3-AA rep. batt., 150x65mm /
5.9x2.6". Photo.
- QUASAR SCIENTIFIC 2 "shirt pocket calculator", scientific, red LED, 3-AA rep. batt., Spain.
Vanity Fair
- Little Teacher, 4-function, %, red LED, 130x137x23mm / 5.1x5.4x0.9", Hong Kong, c1978. Photo
.
VANWARD
- Unknown model number, 4-function, %, green VFD.
Ventora (The box has "Ventora by Gratton". Gratton is a British catalog sales company.)
Ventron
- VT-600, listed in book.
- VT-800M, 4-function, %, memory, green VFD, sealed rechargeable batteries, Japan, horizontal layout.
- VT-888, 4-function, memory, green VFD, 4-AA rep. batt., Japan, horizontal layout.
- VT-1200C aka Metric Conversion, listed in book. Photo, inside.
- ??? version 1, listed in book.
- ??? version 2, listed in book.
Verax
Vic (Mexican company)
Victor Comptometer (U.S. company)
- 1 aka MEC/1 and 80-1420, listed in book.
- 2 aka MEC/2 and 80-1421, listed in book.
- 85 aka Tallymate, listed in book. Featured calculator
.
- 95, listed in book. Photo.
- 104R, listed in book.
- 106, listed in book.
- 223 aka MEC/223, listed in book.
- 225 aka MEC/225, listed in book.
- 226 aka MEC/226, listed in book.
Victron Electronics Corp (Taipei, Taiwan)#
- EC-805, 4-function, %, reciprocal, red LED, 4-AA rep batt, 72x133x28mm / 3.0x5.2x1.1", Taiwan, similar to ANITA hand-held models.
Photo, inside.
- EC-811 Dataexac, 4-function, %, mem, green VFD tubes, 5-AA rep. batt., (88 x 150 mm), Taiwan. Photo
.
- SR-20, 4-function, %, memory, blue VFD, 2-AA rep. batt.
- SR-26 SUPER THIN, 4-function, %, square root, memory, green VFD, 2-AA rep. batt.
- SR-815 "SLIDE RULE CALCULATOR", scientific, green VFD, 4-AA rep. batt.
VIDEOMASTER (Waddington Videomaster Ltd., London, England)
- ENTERPRISE, 4 function, memory, games (Speedway, Brain Drain, Pontoon), Hong Kong, similar to Grandstand but with different games.
VINESS
- TR-80M, 4 function, %, memory, green VFD, 4-AA rep. batt., Japan.
Vista
- Z8FPR, listed in book.
- Z48AA, listed in book.
- Z48M, listed in book.
- Z48P, listed in book.
Vito (Swiss company)
- Elektron 2000, listed in book.
Vornado (Vornado Inc., Garfield, N.J., U.S.A.)
- MODEL 880, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type-2' model.
Voesa
- 880, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a variation of 'Standard type 2' calculator.
- 323, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong.
- 3000, listed in book.
- 3044, 4-function, %, square root, memory, blue LVF, 2-AA rep. batt.
VOLTMATIC
- VOLTMATIC, 4-function, red LED.
Vornado
W
WALTONS
Walther (German company)
- ETR3, 4-function, 8 digits miniature "Nixie"-type tubes, 6V rechargeable battery pack. 151x210x56mm /5.9x8.25x2.2", c1971, Germany. Photo. Featured calculator.
WELCO
- LED 8M, 4-function, %, memory, red LED, 9v PP3 rep. batt., Hong Kong, a 'Standard type-2' model.
Weltelektrik (If you have any details of the company please get in touch)
- Weltelektrik, 4-function, 8 digits amber discharge tubes, 4-C rep batt.,c1972, Japan, , similar to models manufactured by Teal. Photo, inside 1,
inside 2.
- Weltelektrik LE-808, 4-function, red LED, 9v PP3 rep. batt., Japan. Photo, rear. Mar 23.
Wentworth
- RG 301, 4-function, 8 digit red LED display, sealed batt, 3.0x5.25", early boxy styling, Mexico. Photo
.
Western Auto (U.S. company)
- Citation (version 1) aka 66-4986-7, listed in book.
- Citation (version 2), listed in book.
- Electronic Wizard (version 1) aka M4986 and 66-4986-7
, listed in book.
- Electronic Wizard (version 2) aka TXI4993A47, listed in book.
Westra
- II, 4-function, %, red LED.
Whitehall
- WH-1, 4-function, %, memory, red LED, sealed rechargeable batt., U.S.A., similar to Commodore MM3M.
Wild Heerbrugg (Swiss optical instrument maker)
- Ace MAC-19, scientific, red LED, 4-AA rep. batt., Japan, rebranded Casio fx-102. Jan. 24.
Winthronics (We have no details about this company, though it is probably British. If you have any information please get in touch).
- G 88 M, 4-function, %, memory, red LED, PP3 rep. batt., 67x126x23mm / 2.6x5.0x0.9", Singapore. Photo
.
Wintron
- 3000, 4-function, %, memory, red LED, PP3 rep. batt.
- 6000, 4-function, %, memory, red LED, a 'Standard type 2' calculator.
Witco (Witco Ltd., Japan)
- EC-808, 4-function, red LED, 5-AA rep. batt., Japan.
X
XAM (Brand name of own label electronic devices sold through the Korvettes department store chain, with headquarters in New York, U.S.A.)
- 844, 4-function, red LED, PP3 rep. batt., Taiwan.
- 867, listed in book. Photo.
- 877, listed in book.
- 879, 4-function, %, memory, green VFD, 9v PP3 rep. batt., 74x130x34mm / 2.9x5.1x1.3", Taiwan. Photo
.
- 888, 4-function, amber gas-discharge, 4-C rep. batt., Japan, battery-level meter.
- 899, scientific, red LED, 4-AA rep. batt., Taiwan.
Xonex Corporation Ltd. (Toronto, Canada)
- 202, 4-function, %, memory, 9v PP3 rep. batt.
- ELSI V, 4-function, %, square root, square, reciprocal, memory, amber gas-discharge.
- ELSI VI, 4-function, %, memory, 4-C rep. batt., Japan.
- Executive aka. ELSI II, 4-function, green VFD tubes, 4-AA rep batt, 85x145x33mm/3.4x5.7x1.3", Japan, similar to
Deetee ECL-81. Photo.
- MINI 8, 4-function, 9v PP3 rep. batt., membrane keyboard.
Y
Yashica
- Pickey, listed in book. Photo 1, Photo 2
.
YEMCO
- EXP-300, 4-function, %, square root, memory, blue VFD, 2-AA rep. batt., Japan.
Z
ZENITH
- LE-80A, 4-function, red LED, 4-N rep. batt., Japan, rear label marked "NIPPON CALCULATING MACHINE CORP" (i.e. Busicom), same as Busicom LE-80A.
Zeny
- 22M, 4-function, %, sq. rt., memory, blue VFD.
- 33M, 4-function, %, sq. rt., memory, blue VFD, 2-AA rep. batt., Taiwan.
- 801, 4-function, %, sq. rt., blue VFD, 4-AA rep. batt., Taiwan.
- 811, 4-function, %, memory, sq. rt., VFD, 4-AA rep. batt., Taiwan. Photo
- SR-201, scientific, green VFD, 4-AA rep. batt., Taiwan.
- Unknown model number, 4-function, %, memory, 10-digits blue VFD, 2-D rep. batt., Taiwan, mini desktop design.
Click to go to :
Calculator Book Addendum A-B
Calculator Book Addendum C-D
Calculator Book Addendum E-I
Calculator Book Addendum J-O
Calculator Book Addendum P-R
Calculator Book Addendum S
Key to Abbreviations
Functions:
4-funct = 4 basic mathematical functions (addition, subtraction, multiplication, division)
sci-funct = scientific or engineering functions (logarithmic and trigonometric functions such as log, sine, and cosine and usually memory, square, pi, etc.)
mem = memory
% = percent function
exp = exponent
paren
= parentheses
pi = pi value
recip = reciprocal
sgn chg = sign change
sq rt = square root
sq funct = square functions (including square and square root)
Battery Type:
button rep batt
= very small, disk-shaped, replaceable batteries commonly termed button-types, used mainly in LCD models.
rep batt = replaceable batteries (such as 9V, AA, C, and N batteries)
rep batt pack = replaceable batteries in a removable pack
sealed batt = rechargeable batteries sealed in the case
sealed batt pack = rechargeable batteries in a removable pack
Display Type:
See the section on Calculator Displays for more detailed information.
Displays have 8 digits unless specified otherwise.
COS-LCD
= Early Liquid Crystal Display from Sharp showing silver digits on a dark background. COS stands for Crystal on Substrate. This display was used as early as October 1973 but eventually was phased out.
fluor = see VFD.
Gas discharge
= Display containing all digits sealed in a single package employing gas discharge to generate light in the same way as a neon lamp. Normally give amber- or orange-colored digits, and typified by the Panaplex® used by a few calculator manufacturers.
LCD
= Liquid Crystal Display, a flat, gray-digit type of display type that uses less power and was embraced by calculator makers by the end of the 1970s. Early versions (used in the early 1970s) by Rockwell and Sharp are included in this guide.
LED
= Light Emitting Diode display (usually red although sometimes a purple filter was used to color the display). LEDs often have small half bubble-like covers over the digits. tube or mini-tube = separate vacuum or fluorescent tube for each digit of display.
Yellow LCD
= Early LCDs had a reliability problem with ultra-violet light and manufacturers used a yellow-colored filter over the normally gray display to remedy that. Refinements in later LCD designs removed the need for the filter.
VFD
= Vacuum Fluorescent Display. Display containing all digits sealed in a single tube generating light from an electrical discharge onto a fluorescent material. The color of the digits is normally green or blue, or somewhere in between.
Other Information:
Klixon keypad
= Texas Instruments Klixon® keypad was one of the earliest keypads and used greatly by Bowmar and a few other early calculator makers. It had the four basic functions and used metal key pads about 1/2" square.
Japan (for example) = country of manufacture as stated on calculator
RPN = Reverse Polish Notation, a method of calculating and user data entry used by HP calculators. A few other manufacturers also used RPN in more limited scale.
"aka" (also known as) is used when there is another name or model variation on the calculator.
"c"
(for example, c1973) is used as "circa," denoting at approximately that time.
A big thanks to Thomas Brockmeier, Richard Brooks, Andrew Davie, Larry Gilbert, Niels Grot, Palmer Hanson, Steve Haynes, Robert King, Kent King, Jeff Lane, Philippe Leckler, Ken Meine, Bob Patton, James Redin, and CB Wilson for
their help.
How to Buy the Book!!!!
Collector's Guide to Pocket Calculators
by Guy Ball and Bruce Flamm
This 204 page, softcover book is the world's most comprehensive listing of electronic pocket calculators from the 1970's, the so-called Golden Age of Pocket Calculators. Over 1,500 known calculators are detailed with
information on features, size, display type, power type, and pricing. In addition, when known, the listing also contains date of sales, original pricing, and country of origin information.
The book features over 470 photographs of various models from over 240 manufacturers around the world (including calculators from lesser-known companies in England, Switzerland, Netherlands, Spain, Germany, Bulgaria, and Russia).
"The Collector's Guide to Pocket Calculators" includes a comprehensive value guide to help you gauge rarity and desirability of the various models -- especially as they
relate to each other.
The book can be purchased for $20.00 plus $5 for USA mailing ($10 for first class mailing to Canada, and $23 to other countries). California residents please add $1.86 state sales tax.
For payment by PayPal, or for additional details and information, contact co-author Guy Ball. Guy is happy to sign the books if asked.
Copyright ©1997 Guy Ball and Bruce Flamm, ©2002-2024 Nigel Tout