APF - U.S.A.
Marketing company which introduced a large range of, mainly, hand-held electronic calculators in the early 1970s.

Bell Punch Company / Anita - UK.
The Bell Punch Anita models of 1961 were the first electronic desktop calculators.

Bowmar - U.S.A.
A pioneer of hand-held electronic calculators, was one of the largest manufacturers in the world in the early 1970s.

Brunsviga - Germany
Major manufacturer of pinwheel and stepped-gear mechanical calculators.

Burroughs - U.S.A.
A major supplier of accountancy equipment and mechanical calculators, Burroughs produced a range of electronic desktop calculators in the late 1960s-early 1970s.

Busicom / Nippon Calculating Machine Corp - Japan.
A very innovative company that produced the first single-chip calculator, the first true pocket calculator, and was inolved in the development of the microprocessor.

Canon - Japan.
Produced a range of electronic desktop calculators from the mid 1960s, and hand-held calculators from the early 1970s, including some of the first hand-held models.

Casio - Japan.
Produced a range of electronic desktop calculators from the mid 1960s and very competitively priced hand-held calculators in the early 1970s. Is still a major producer of calculators.

Commodore / cbm - Canada/U.S.A.
Office equipment supplier with a small range of mechanical add-listers, it was a major manufacturer of hand-held calculators in the 1970s.

Comptometer / Felt & Tarrant - U.S.A.
Felt & Tarrant manufactured the Comptometer, the most successful key-driven mechanical calculator.

Compucorp - U.S.A.
Produced a range of high-specification scientific and financial calculators in the late 1960s/early 1970s.

Elektronika - U.S.S.R.
Ministry of Electronics, was responsible for the introduction and development of electronic calculators into Russia and the other members of the U.S.S.R.

Facit - Sweden.
Was one of the major manufacturers of mechanical calculators, and marketed early desktop and hand-held electronic calculators made by other companies.

Friden - U.S.A.
A major manufacturer of high-specification mechanical calculators, it produced one of the first fully transistorised electronic desktop calculators in 1964, and followed with a range of models.

General Instrument - U.S.A.
A pioneering calculator integrated cicuit manufacturer that produced a range of calculators in the mid-1970s before selling the designs to the U.S.S.R.

Hewlett Packard - U.S.A.
Produced scientific desktop electronic calculators from the late 1960s. Introduced the first hand-held scientific calculator, the first hand-held financial calculator, and the first hand-held programmable calculator. Is still a major producer of scinetific and financial calculators.

Hitachi - Japan.
Manufactured a range of electronic desktop calculators in the late 1960s/early 1970s, often sold under other names.

IME - Italy.
The company produced one of the first fully transistorised electronic desktop calculators in 1964, and followed with a range of models.

Litronix - U.S.A.
A manufacturer of LED displays, Litronix moved into calculators and became a major supplier.

Lloyd's - U.S.A.
Known for its stereo equipment, it marketed a wide range of electronic calculators in the early 1970s, including some of the first with LCD displays.

Marchant - U.S.A.
A major manufacturer of high-specification mechanical calculators, it produced a few electronic desktop calculators in the early 1970s.

Monroe - U.S.A.
A major manufacturer of high-specification mechanical calculators, it produced a few electronic desktop calculators in the late 1960s.

National Semiconductor - U.S.A.
A major semiconductor manufacturer which manufactured  a range of highly successful hand-held calculators in the mid-1970s.

Odhner - Russia and Sweden.
Pioneer and major manufacturer of the pinwheel mechanical calculator up to the 1970s.

Olivetti - Italy.
Specialised in 10-key mechanical add-listers from the mid-1940s, produced one of the first programmable electronic desktop calculators, and a range of very stylish electronic calculators.

Rapid Data - Canada.
Produced a range of highly competitive priced hand-held calculators in the early 1970s.

Rockwell - U.S.A.
Pioneer calculator chip manufacturer, introduced a range of highly successful hand-held calculators in the mid-1970s.

Sanyo - Japan.
Produced a wide range of hand-held calculators in the early 1970s.

Sharp - Japan.
Highly innovative company, produced one of the first electronic desktop calculators in 1964, one of the first hand-held calculators, and some of the first calculators with LCD displays. Is still a major producer of calculators.

Sinclair - UK.
Produced a range of highly innovative hand-held calculators in the 1970s.

Summit - U.S.A.
Produced a range of small, very distinctive hand-held calculators in the early 1970s.

Teal - Japan and U.S.A.
Produced a range of electronic calculators in the 1970s, including one of the first solar powered calculators.

Texas Instruments - U.S.A.
Semiconductor manufacturer that was a pioneer of the hand-held calculator in the late 1960s, and produced its own models from the early 1970s. Is still a major producer of calculators.

Toshiba - Japan.
Manufactured electronic desktop calculators from the late-1960s and hand-held calculators from the early 1970s to the mid-1970s.

Victor - U.S.A.
Produced low cost, high quality, mechanical add-listing machines. Had a bad experience with electronic calculators in the mid-1960s, but a range of these was eventually produced. Calculators are still marketed under the Victor name.