Below is an index to the makers of handheld electronic calculators in the division of Medicine & Science at the National Museum of American History.
- APF Electronics
- Addison-Wesley
- Berkey-Keystone Division
- Bomark International
- Bowmar/Ali
- Brother International
- Calfax
- Canon
- Cartron
- Casio Computer
- Coleco
- Commodore
- Commodore Japan
- Compex
- Corvus Corporation
- Craig Corporation
- Dataking, Inc.
- Digitrex
- Dynamic Instrument
- Eiko Business Machines
- Enterprex
- Fitness Now, Inc.
- General Instruments
- Hanimex
- Hewlett-Packard
- Inventa Electronics
- Invicta Plastics, Ltd.
- J.C. Penney
- Jefferson Electric
- Keystone
- Kings Point Corporation
- Litronix
- Litton Industries
- Lloyd's Electronics
- Macmillan Company
- Matsushita Co., Ltd.
- Michigan Council of Teachers of Mathematics
- Montgomery Ward
- National Semiconductor
- Nobility
- John B. Priser
- Radofin
- Rapid Data Systems
- Remington Rand Inc.
- Rockwell International
- Sanyo Electric Company
- Sears, Roebuck and Co.
- Sharp Corporation
- Sinclair Radionics Ltd.
- Sperry-Univac Computer Systems
- Summit International
- Tandy Corporation
- T-A Vertriebs-GmbH
- TecXon
- Texas Instruments
- Tokyo Electronic Application Laboratory Ltd.
- Tokyo Shibaura Electric Company
- Toshiba Corporation
- Toyo
- Tyrom
- Unisonic
- Universal Data Machine
- Victor Comptometer Corporation
- Western Auto Supply
- Zayre Discount
- Zykkor