Additional Pictures 


The sales box of the Business Edge calculator sold in 1988 in Germany.

This Business Edge was manufactured in January 1988 by 
Inventec Corporation in Taiwan (Date code I-0188 mth 01 yr 1988).

The display of the Business Edge in the self-test
mode with all segments activated.

The huge LC-display of the Business Edge 
covers the calculator brain easily.

Removing the LC-display reveals the Toshiba T9728
single-chip calculator circuit. 

Close-up view of the Toshiba T9728 single-chip calculator circuit.

Close-up view of the PCB-Mark of the Business Edge.


horizontal rule

If you have additions to the above article please email:

Joerg Woerner, May 4, 2003. No reprints without written permission.