HP-18C
| Company type | Product |
|---|---|
| Industry | Calculator manufacturing |
| Founded | June 1986 |
| Founder | Hewlett-Packard |
| Products | Business-oriented calculator |
The HP-18C is a business-oriented calculator developed by Hewlett-Packard and launched in June 1986. It was soon replaced by the closely related but improved HP-19B. Significantly, the HP-18C marked HP's initial use of an internal RPL architecture; however, this feature was not user-accessible due to its non-programmable design. The calculator included a solver function, a first for HP devices, and provided approximately 1.5 KB of continuous memory dedicated to equation storage.
Users interact with its capabilities via a menu-based interface. Its clamshell construction enhances robustness, though the battery compartment consistently proved to be a fragile component in the 18C, 19B, and 28C/S models.