Posts: 1,755
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Joined: Jan 2005
If I recall correctly, such classic calculators as the HP-25, HP-67, ... up to, and including, the HP-71B did use
the Helvetica font for the key legends.
Best regards from V.
Posts: 312
Threads: 25
Joined: Jan 1970
The keyboard font is Helvetica, plain and simple, with added symbols whenever needed, and a certain admixture of Times for the symbols in italics (such as the x<>y key).
I have created several fonts to copy the look of the classic calculators, and they work remarkably well. You can see a sample in the HP-68WX keyboard layout in that infamous April Fools joke of two or three years ago.
The fonts, however, are made for Macintosh and will only work well there. So far I haven't succeeded in porting them to Windows. If you'd like to have the Mac fonts, send me a message to
eamalaga AT earthlink DOT net
-Ernie (12345)