HP-33E/C
| Company type | Product line |
|---|---|
| Industry | Calculator manufacturing |
| Founded | 1978 |
| Founder | Hewlett-Packard |
| Defunct | 1983 (except HP-31E in 1980) |
| Products | Scientific handheld calculators (HP-31E, HP-32E, HP-33E/C, HP-34C, HP-37E, HP-38E/C) |
| Owner | Hewlett-Packard |
The HP-30 series, also referred to as the Spice series, comprises scientific handheld calculators utilizing RPN, launched by Hewlett-Packard in 1978. Certain variants within this lineup support programmability.
Overview
Designed as a successor to the older HP-20 series, the HP-30 (Spice) calculators introduced enhancements such as larger digit displays and comma separators for improved readability, though they do not offer expansion capabilities.
At the entry-level, the HP-31E and HP-32E models were not programmable; notably, the HP-31E featured a built-in self-test function. Within the Spice range, the HP-37E and HP-38E/C were tailored to meet financial calculation requirements.
These devices operate on batteries that can be replaced without the need for tools, with their casings held together by screws.
Programming
Programmable units in this series include the HP-33E/C, which supports 49 program steps plus subroutines; the HP-34C, allowing 70 steps; and the HP-38E/C, capable of 99 steps. Models designated with a "C" suffix incorporate non-volatile memory to retain programs after power-off.
Manufacture of the HP-31E concluded in 1980, while production of other Spice calculators ended in 1983. The series is distinguished by its robust build quality, satisfying tactile feedback during key presses, and dependable performance appreciated by engineering professionals.
Simulators and emulators
Features
- Extensive scientific computation functions
- Statistical analysis tools (available on HP-32E, HP-37E, HP-38E/C)
- Capability for numerical integration (HP-34C)
- Programmable keystroke sequences incorporating branching, loops, conditional tests, and flags