HP-18C

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A HP-18C

The HP-18C was a Hewlett-Packard business calculator which was quickly followed by the very similar but greatly improved HP-19B. The HP-18C was HP's first RPL-based calculator even though this model was not user programmable. The user did have a solver (another HP first) available, but only had about 1.5 K of continuous memory available to store equations.

The calculator had many functions buried in a menu structure. The clamshell design was fairly robust, but the battery door is the Achilles' heel of this whole line; 18C, 19B, and 28C/S.

The HP-18C was introduced in 1986.

External links

HP-49/50 graphing series:
  • HP-49g
  • HP-49g+
  • HP-48gII
  • HP-50g
HP-48 graphing series:
  • HP-48s
  • HP-48sx
  • HP-48g
  • HP-48gx
  • HP-48g+
HP-39/40 graphing series:
  • HP-39g
  • HP-39g+
  • HP-49gs
  • HP-40g
  • HP-40gs
Other graphing:
Scientific programmable models:
HP-10c compact series:
Other calculator models
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