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Canon CB-8 Checkbook

Date of introduction:  1983 Display technology:  LCD
New price:   Display size:  8
Size:  2.8" x 6.0" x 0.3"
 70 x 152 x 7 mm3
   
Weight:  2.4 ounces, 69 grams Serial No:  
Batteries:  CR2025 Date of manufacture:  year 1984
AC-Adapter:   Origin of manufacture:  Japan
Precision:  8  Integrated circuits:  NEC uPD1833G
Memories:  3    
Program steps:   Courtesy of:  Joerg Woerner

The first Canon Checkbook calculator was introduced in 1982 - about three years after National Semiconductor's NS103 started the idea of an Account Manager - and outdated Texas Instruments' TI-2200 by a few weeks. A less powerful version with only one memory was sold as Checkbook Junior.

This Canon CB-8 Checkbook calculator sold in Europe uses the housing of the original Checkbook but added a red [A↔F] key to toggle between two entry modes:

Indicator (--) Floating decimal with manual insertion of the decimal using the [.] key
Indicator (AM) Add mode with the decimal automatically put in the dollars and cents position (0.00)

Dismantling this CB-8 Checkbook calculator manufactured in 1984 in Japan reveals a very solid construction centered around a NEC uPD1833G single-chip calculator circuit and it seems to be 100% identical with the Checkbook.

Don't miss the Corvus CheckMaster introduced by MOSTEK already in 1975. This rare product retains the balance of your memory even when shut off but uses power-hungry electronics.

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If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, November 22, 2019. No reprints without written permission.