# HP-38G

> Graphing calculator by Hewlett-Packard

**Wikidata**: [Q5635556](https://www.wikidata.org/wiki/Q5635556)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/HP_38G)  
**Source**: https://4ort.xyz/entity/hp-38g

## Summary
The HP-38G is a graphing calculator developed by Hewlett-Packard, released in 1995 as a successor to the HP-28 series. It features a unique Reverse Polish Notation (RPN) entry system and was designed for educational use, emphasizing mathematical and scientific applications. The device combines advanced computational capabilities with user-friendly software tools.

## Key Facts
- **Manufacturer**: Hewlett-Packard, a U.S.-based information technology company (1939–2015).
- **Release Year**: 1995.
- **Predecessor**: HP-28 series.
- **Successor**: HP-39G (released in 2000).
- **Operating System**: Custom HP operating system with RPN logic.
- **Display**: Monochrome LCD, 131x80 pixels.
- **Processor**: 4 MHz Motorola 68000-based CPU.
- **RAM**: 512 KB (expandable via memory cards).
- **Notable Features**: Equation solver, statistical analysis, symbolic manipulation, and educational software packages.

## FAQs
### Q: When was the HP-38G released?
A: The HP-38G was released in 1995 as part of Hewlett-Packard’s line of graphing calculators.

### Q: What makes the HP-38G unique?
A: It uses Reverse Polish Notation (RPN) for efficient calculation workflows, a hallmark of many HP calculators, and includes specialized educational software.

### Q: Is the HP-38G still supported today?
A: The HP-38G is discontinued, succeeded by models like the HP-39G, but remains functional for basic mathematical and graphing tasks.

## Why It Matters
The HP-38G played a significant role in mathematics and science education during the 1990s, offering advanced graphing and computational tools tailored to students. Its RPN system, distinct from algebraic entry methods, provided efficiency for complex calculations, appealing to engineers and educators. As part of HP’s calculator lineage, it bridged the gap between earlier models like the HP-28 and later educational-focused devices, reflecting HP’s commitment to innovation in handheld computing. Its legacy is evident in its successors and the continued use of RPN in niche technical fields.

## Notable For
- **RPN Entry System**: Enabled efficient, stack-based calculations without parentheses.
- **Educational Software**: Included applications for algebra, calculus, and statistics, aligning with curriculum needs.
- **Hardware Expandability**: Supported memory card upgrades for storing programs and data.
- **Display Clarity**: High-resolution monochrome screen for detailed graphing.
- **Ergonomic Design**: Compact, durable build with a focus on usability in classrooms.

## Body
### Release and Development
The HP-38G was launched in 1995, succeeding the HP-28 series and preceding the HP-39G (2000). It was part of HP’s efforts to compete in the educational calculator market dominated by Texas Instruments.

### Technical Specifications
- **Processor**: 4 MHz Motorola 68000-based CPU.
- **Memory**: 512 KB RAM (expandable via proprietary memory cards).
- **Display**: 131x80 pixel monochrome LCD.
- **Power**: 3 AAA batteries with optional AC adapter.

### Features
- **RPN Logic**: Reduced keystrokes for complex equations compared to algebraic entry.
- **Software Tools**: Equation solver, numerical integration, and statistical analysis.
- **Connectivity**: Infrared port for data transfer between devices.
- **Programming**: Supported user-created programs in RPN keystroke sequences.

### Legacy
The HP-38G influenced subsequent HP models and maintained a niche following among RPN enthusiasts. Its educational focus and durability made it a staple in some school programs, though it ultimately gave way to more affordable, algebraic-entry graphing calculators.