Hand-held Calculators

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Unicom 102

Unicom 102
Unicom 102 battery holder

Showing the unusual, detachable, battery holder.

Unicom 102

Distinctive features: A calculator from Unicom.  The company was taken over by Rockwell before it launched its own range of calculators.

Technical details:
Display is 8 digits, red LED.


9v (PP3).

75 mm x 146 mm x 23 mm (3" x 5.75" x 0.9").


Is marked -
Unicom Systems
Rockwell International

Unicom Systems, Sunnyvale, CA USA.
Assembled in Mexico.

Significance: Unicom was started by the American semiconductor company American Microsystems Inc. (AMI).  AMI integrated circuits were also used by several other calculator manufacturers.
In 1972 AMI was bought by Rockwell and the Unicom name soon disappeared to be replaced by the Rockwell name on a line of very successful calculators, such as the Rockwell 8R.  Rockwell exited the consumer electronics market in the late 1970s.

Further information about Rockwell can be found in the Calculator Companies section.

Hand-held Calculators

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Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2024.