HP 33s
| Industry | Electronics, Computer hardware |
|---|---|
| Founded | January 1, 1939 |
| Headquarters | United States |
| Products | Scientific calculators, including HP 33s |
The HP 33s (model F2216A) is a scientific calculator that was produced and sold by Hewlett-Packard. Launched in 2003 as the follow-up to the HP 32SII, its production ceased in 2007 when the HP 35s was introduced.
Features
Notable capabilities include:
- Choice between RPN and conventional semi-algebraic (infix) input methods
- Dual-line LCD screen
- Extensive scientific and engineering calculation functions
- Programmable via keystrokes with comprehensive boolean logic and program control features, including editing of program lines
- HP’s "equation list" editor allowing fully algebraic expressions, which can be used independently or embedded within programs
- HP Solver functionality for resolving equations and functions with a single variable
- Ability to perform numerical integration
- Complete feature set accessible in all operational modes
- Conversion tools for units and a database of constants
- Memory capacity of 31 KB (approximately 7 KB more than previous HP programmable calculators)
When compared with the HP 32SII, the HP 33s introduced:
- A revamped keypad design and visual style
- Increased memory from 2 KB up to 32 KB
- Enhanced processing speed
- Additional operational functions
- The option to use algebraic entry mode alongside RPN input
- A two-line display interface
- An equation character limit set at 255 (previously unlimited)
The HP 33s was developed in collaboration with and manufactured by Kinpo Electronics based in Taiwan.
Reception
Overall, the HP 33s is regarded as having fewer logical errors than the subsequent HP 35s. Nonetheless, its distinctively styled chevron-shaped keypad has drawn criticism from users and reviewers for being awkward and less intuitive compared to other professional-grade HP calculators.
Revisions
Several updated versions of the HP 33s addressed initial shortcomings, notably enhancing both the display quality and the responsiveness of the keypad.