Canon card F-72

The Canon card F-72 introduced in 1980 a remarkable powerful scientific/statistical calculator in a foldable housing.
It is the successor of the F-71 with similar functionality in a traditional housing.

Dismantling the calculator took some time but revealed an interesting construction. In a first step the back shells of the housing could be removed and in a second step the electronics could be removed from the keyboard and display.

The whole electronics of the F-72 is integrated in a Toshiba T3801S single-chip calculator circuit soldered on a huge flexible printed circuit board covering the whole calculator.

Don't miss the Canon card F-63 with the same specifications in a different package.

Texas Instruments introduced almost 10 years later with the SC-10 a similar approach but used a combination of rigid PCB's and flexible connections between.

With the F-73 we got the landscape housing back in the upper end of Canon's scientific/statistical calculator line. 

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

© Joerg Woerner, March 17, 2004. No reprints without written permission.