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HP-30 series

The HP-33C
Type	Programmable scientific
Manufacturer	Hewlett-Packard
Introduced	1978
Discontinued	1983
Calculator
Entry mode	RPN
Precision	10 display digits exponent ±99
Display type	LED
Display size	1 line
CPU
Processor	Saturn (Lewis)
Programming
Programming language(s)	RPN key stroke (fully merged)
Firmware memory	? KB of ROM
Interfaces
Ports	no
Other
Power supply	2×1.5V AA cell batteries or power supply
Weight	6 oz (170 g) to 8 oz (230 g)
Dimensions	141×75×29mm

The HP-30 or Spice series are RPN Scientific hand-held calculators introduced by Hewlett-Packard in 1978. Some models are programmable.

Overview

Perhaps the HP-30 series, Spice, was to be released as a replacement for the aging HP-20 series. It has no expandability. The display provided better readability by increasing the digit size and adding commas.

The entry-level was the HP-31E and 32E, that were not programmable; but even the 31E provided a Self-check.

The HP-37E and 38E/C were the financial models of the Spice series.

The battery of these calculators can be changed without using tools. The housing is closed by screws.

Programming

The HP-33E/C (49 steps plus subroutines) and HP-34C (70 steps) and 38E/C (99 steps) are programmable, the C-models have a permanent memory.

The production of the 31E ended in 1980, production of the other Spice models ended in 1983. As this calculator is regarded amongst the very good in terms of quality, key stroke feel and daily usability for engineers.

Simulators and emulators

• HP Calculator emulators for Linux

Features

• All basic scientific functions
• Statistics (HP-32E, HP-37E, HP-38E/C)
• Numerical integration (HP-34C)
• Programmability (keystroke programming with branching, loops, tests and flags)

See also

• HP-34C
• HP calculators
• List of Hewlett-Packard pocket calculators

References

1. "HP CPU and Programming". Museum of HP Calculators. Retrieved 2022-02-27.
2. "30 Series Technology and Packaging". www.hpmuseum.org. Retrieved 2022-02-27.
3. ^ "HP-38C Features". Museum of HP Calculators. Retrieved 2022-02-27.
4. "HP-31E". Museum of HP Calculators. Retrieved 2022-02-27.
5. "HP-Models". thimet.de. Retrieved 2022-02-27.
6. "HP-33E/C". Museum of HP Calculators. Retrieved 2022-02-27.
7. ^ "HP-34C". Retrieved 2022-02-27.
8. "HP-31E".
9. "HP-32E". Museum of HP Calculators. Retrieved 2022-02-27.
10. "HP-37E Features". Museum of HP Calculators. Retrieved 2022-02-27.

External links

• Third Generation of HP Calculators (1978) on hpmuseum.org
• HP-30 series description on thimet.de
• "HP-32E Calculator Simulator (iOS)". Retrieved 2022-02-27.

• HP calculators
• HP programmable calculators
• Computer-related introductions in 1978