DATAMATH CALCULATOR MUSEUM
|This Radio Shack EC-4000 was manufactured
in July 1979 by
Texas Instruments in Abilene, TX (Date code ATA 2979 » wk 29 yr 1979).
|The printed circuit board
(PCB) of the EC-4000 looks very familiar to us.
It is 100% identical with the Texas Instruments TI-57 Programmable.
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© Joerg Woerner, November 11, 2009. No reprints without written permission.