The HP-21 (Pumpkin)
Introduced on the 1st of February 1975, discontinued the 1st of May 1978.
A powerful basic calculator. Not programmable. The only HP calculator that used a switch to select between Degrees and Radians mode.
User Manuals (English, German and Dutch)
Flyer
To download a scan of this flyer, click on the flyer.
See also my HP-21 inside page.
HP-21 related links: