Handy Adder


This key-driven counter has four plastic keys, a plastic case, plastic number dials, and metal springs. There are four keys across the top and four number dials in front. Totals of up to 9999 can be indicated, although the carry appears only to work from one column to the adjacent column. The columns are labeled from right to left "CENTS" "DIMES" "DOLLARS and "10 DOLLARS". Pushing any of the three right keys increases the corresponding digit below. Pushing the leftmost key decreases the 10 dollars amount by one unit.

Location: Currently not on view

Place Made: China: Hong Kong

See more items in: Medicine and Science: Computers


Exhibition Location:

Credit Line: Gift of Michael R. Williams

Data Source: National Museum of American History

Id Number: 1988.0300.02Catalog Number: 1988.0300.02Accession Number: 1988.0300

Object Name: Adder

Physical Description: plastic (overall material)Measurements: overall: 1.6 cm x 13 cm x 7 cm; 5/8 in x 5 1/8 in x 2 3/4 in

Guid: http://n2t.net/ark:/65665/ng49ca746a9-07bd-704b-e053-15f76fa0b4fa

Record Id: nmah_1064825

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