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Hewlett Packard

The HP-65 is arguably the most elegant and classic pocket calculator ever built.

Boasting many firsts, including being the first fully programmable hand-held calculator with built-in magnetic card reader, it was used for course corrections on Apollo, and was introduced as "The Personal Computer" when keypunch machines were still the most common input device for mainframes.

While pricey, nearly $800 back in 1974, its quality and innovations garnered many enthusiasts, spawning clubs like the HP-65 Users Club and triggering medical recoveries (but that's another story!).

Thanks to Mike Dutch - Picture from

Gary Clouse reports:
The early HP calculators were legendary for their durability. there were stories of them surviving 40 ft drops onto concrete, exposure to the weather for several months, and being run over by heavy eauipment on construction sites. The circuit board and battery contacts were gold-plated to prevent corrosion. There was a joke among engineering students that if there was a nuclear war, the survivors would be HP calculators and cockroaches.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.
MANUFACTURER  Hewlett Packard
TYPE  Professional Computer
YEAR  1974
BUILT IN LANGUAGE  Reverse Polish Notation (RPN)
KEYBOARD  35 multi-function keys
CPU  HP CPU (several chips)
SPEED  Unknown
RAM  100 steps, 9 registers
ROM  Unknown
TEXT MODES  1 line, 10+2 chars LED display
SIZE / WEIGHT  8.15 (W) x 15.25 (L) x 3.55 (H) cm
BUILT IN MEDIA  Built-in magnetic card reader/writer
POWER SUPPLY  Battery pack containing 3x AA rechargeable cells
PRICE  $795

retro computing t-shirts and goodies
3D Cubes
BASIC code
C64 maze generator
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Pixel adventure
Pixel Deer
Ready prompt
Shooting gallery
Spiral program
Vector ship

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