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The HP-18C was a Hewlett-Packard business calculator which was quickly followed by the very similar but greatly improved
HP-18C
on MyCalcDB (database about 1970s and 1980s pocket calculators)
{{Authority control 18C
The HP-18C was a Hewlett-Packard business calculator which was quickly followed by the very similar but greatly improved HP-19B
HP-19B, introduced on 4 January 1988, along with the HP-17B, HP-27S and the HP-28S, and replaced by the HP-19BII (F1639A) in January 1990, was a simplified Hewlett Packard business model calculator
An electronic calculator is typically a ...
. The HP-18C was HP's first RPL-based calculator internally, even though this was not visible on user-level in this non user-programmable model. The user did have a solver (another HP first) available, but only had about 1.5 KB of continuous memory The term continuous memory was coined by Hewlett-Packard (HP) to describe a unique feature of certain HP calculators whereby the calculator could internally sustain most, or in later models - all, of the contents of user memory (via battery-backed C ...
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 shortcoming of this whole line; 18C, 19B, and 28C/S.
The HP-18C was introduced in June 1986.
See also
* HP calculators * List of Hewlett-Packard products: Pocket calculatorsReferences
External links
HP-18C
on MyCalcDB (database about 1970s and 1980s pocket calculators)
{{Authority control 18C