Information About

Hp-65
  CATEGORIES ABOUT HP-65
   
programmable calculators
   
hp calculators
   
65
   
1974 introductions
   
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The HP-65 offered very rudimentary program editing capabilities, however, and its storage register R9 was corrupted whenever the user (or program) executed trigonometric functions or performed comparison tests. This problem was documented in the manual, and it is therefore not considered a bug.

Bill Hewlett 's design requirement was that the calculator should fit in his shirt pocket. That is one reason for the tapered depth of the calculator. The magnetic program cards fed in at the thick end of the calculator under the LED display. The documentation for the programs in the calculator is very complete, including algorithms for hundreds of applications, including the solutions of differential equations, stock price estimation, statistics, and so forth.

During the 1975 Apollo-Soyuz Test Project , the HP-65 became the first programmable handheld calculator in Outer Space .


EXTERNAL LINKS

  • The HP-65 at an unofficial Hewlett-Packard museum; includes a photograph of the magnetic card.

  • MyCalcDB (database about 70's and 80's pocket calculators)