DATAMATH CALCULATOR MUSEUM
Radio Shack EC-4002
|Date of introduction:||1978||Display technology:||LCD (yellow)|
|New price:||Display size:||8|
|Size:||5.4" x 2.7" x 0.35"|
|Weight:||2.8 ounces||Serial No:||02111|
|Batteries:||3*LR44||Date of manufacture:||year 1978|
|AC-Adapter:||Origin of manufacture:||Japan|
|Precision:||8||Integrated circuits:||Toshiba T3690, T3691|
|Program steps:||Courtesy of:||Joerg Woerner|
Radio Shack EC-4002 is an OEM-version of the Toshiba LC-836MN
could be called the first portable electronic Databank. It
was introduced already in the year 1978 and was 9 years ahead the first Mini
Data Bank sold by Texas Instruments.
The alphanumeric display uses an odd 8-segment layout with one additional segment to the standard calculator layout. The display on the right reads "MEMORY".
Radio Shack gave in their manual a lot of ideas what you can store in the 30 memory places:
name and telephone number
• Bank name and balance
• Person's name and date of birth
• Passport number, Cash card number, License number
• Caloric value of foods
• Various rate of money exchange
• Golf scores
• Key and Locker number
• Constants such as C = 2.997925, me = 9.1091, K = 1.38054
Don't miss later Personal products like the Avigo, introduced 20 years later.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.