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Radio Shack (a Tandy Corporation company, Fort Worth, Texas, U.S.A.)
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Radio Shack EC-200, inside.
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Radio Shack EC-220. Featured calculator.
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Radio Shack EC-225. Mar 07.
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Radio Shack EC-226
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Radio Shack EC-281.
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Radio Shack EC-490.
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Radio Shack EC-4001. Featured calculator.
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Radofin (British marketing company - Triton was a registered trade name of the company. See the British Calculators section.)
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Radofin 870
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Radofin 1000 "Triton". Details.
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Triton 1200, resembles Taktile 2001M. Featured British calculator.
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Radofin Triton 1400. Featured British calculator.
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Radofin 1610 "Valuman". Featured British calculator.
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Radofin 1640. Details. Aug 07.
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Radofin 1660. Featured British calculator.
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Radofin 2200, style 1.
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Radofin 2200, style 2. Aug 07.
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Radofin 2500. Details. Mar 07.
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Rambler (please get in touch if you have any information about the company)
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Rambler. Details.
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Ramsgate (Ramsgate Inc., Eveleth, Minnesota, U.S.A.)
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Ramsgate M-11. This calculator features in the "One Hit Wonders" article.
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Rapid Data (See the Calculator Companies section for more information.)
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Rapid Data Dataman 800, also available in green and in cream. Featured calculator.
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RBM (U.S. company)
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RBM Scientific, inside. This calculator features in the "One Hit Wonders" article. Mar 07.
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Realtone (Euro-market company)
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Realtone Conversion Master KP-60. Details.
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Regan (Regan Industries, Glendale, Claifornia, U.S.A.)
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Regan RA900P. This calculator features in the "One Hit Wonders" article.
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Reno (German company)
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Reno 952. Details.
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RES (Radient Energy Systems, U.S.A.)
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RES Mark IX
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Revtronic (We have no information about this company. If you can help please get in touch with us.)
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Revtronic (no model number). Details.
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Rex
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rex 8. Details. Feb 08.
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RFT
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RFT minrex 75. Featured calculator.
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RFT konkret 100 and konkret 200 models. Details.
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RFT konkret 400 and Elektronika b3-19M. Details.
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Ricoh
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Ricoh RC-8A
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Ricoh RC-8L
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RJP
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RJP 880. Featured calculator.
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Rockwell (USA company, started as calculator IC maker. Also sold calculators under the names Anita and Unisonic. See the Calculator
Companies section for more information.)
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Rockwell 8R. Featured calculator.
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Rockwell 9TR. Featured calculator.
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Rockwell 10R.
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Rockwell 14RD.
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Rockwell 14RD II.
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Rockwell 18R.
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Rockwell 18T. Details. Mar 08.
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Rockwell 20R.
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Rockwell 20T. Details.
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Rockwell 21R.
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Rockwell 22K.
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Rockwell 24K II, inside.
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Rockwell 24RD
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Rockwell 24RD II.
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Rockwell 30R.
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Rockwell 31R.
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Rockwell 44RD.
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Rockwell 51R "Converter"
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Rockwell 61R.
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Rockwell 63R.
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Texas Instrument TI-76 and Rockwell '76 (Calculators made to celebrate USA bicentennial in 1976)
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Rockwell 202 Slide Rule.
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Royal (Royal Typewriter Company. U.S. company, distributed in Britain by Imperial Typewriter Company, both Litton Industries companies)
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Royal 80K, very small but chunky calculator.
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Royal 81M, very small but chunky calculator.
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Royal 90S.
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Royal Digital III, inside 1, inside 2, highly unusual 4-digit tube display, operated using a
stylus. Featured calculator.
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Royal Digital IV, inside1, inside2, 8-digit LED version of the Digital III. Featured calculator.
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Royal Digital V. Featured British calculator.
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Royal 5HPD
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Royal Digital 5-M (Appears to be the same as the Royal Award GT8). Featured British calculator.
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Royal Digital 5-T. Featured British calculator.
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Royal Five GT. Featured British calculator.
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Royal Mini Five. Featured British calculator.
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