Additional Pictures 


This Exactra 20 was manufactured in August 1974 by Texas Instruments
(Date code 334 wk 33  yr 1974).

The Exactra 20 with its 6-digit display and costly keyboard.

The double-sided printed circuit board (PCB) of the Exactra 20.

Close-up of the TMS0135 single-chip calculator circuit.

horizontal rule

If you have additions to the above article please email:

Joerg Woerner, January 4, 2018. No reprints without written permission.