# HP-42S

> Programmable RPN Scientific hand held calculator by Hewlett Packard.

**Wikidata**: [Q3076072](https://www.wikidata.org/wiki/Q3076072)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/HP-42S)  
**Source**: https://4ort.xyz/entity/hp-42s

## Summary
The HP-42S is a programmable RPN (Reverse Polish Notation) scientific handheld calculator produced by Hewlett-Packard. It succeeded the HP-41C and was followed by the HP-28 series, marking an evolution in programmable calculators.

## Key Facts
- **Type**: Programmable RPN scientific handheld calculator
- **Manufacturer**: Hewlett-Packard
- **Predecessor**: HP-41C (programmable scientific RPN handheld calculator)
- **Successor**: HP-28 series (graphing calculators)
- **Display Technology**: Liquid-crystal display
- **Instance of**: Calculator
- **Aliases**: HP 42S
- **Wikipedia Title**: HP-42S
- **Commons Category**: HP-42S
- **Wikipedia Languages**: Available in English, German, Spanish, French, Japanese, and Polish

## FAQs
### Q: What was the HP-42S used for?
A: The HP-42S was a programmable RPN scientific calculator designed for advanced mathematical and engineering calculations.

### Q: Who manufactured the HP-42S?
A: The HP-42S was manufactured by Hewlett-Packard, an American information technology company.

### Q: What came before and after the HP-42S?
A: The HP-42S succeeded the HP-41C and was followed by the HP-28 series of graphing calculators.

### Q: What type of display did the HP-42S have?
A: The HP-42S featured a liquid-crystal display.

### Q: Is the HP-42S available in multiple languages?
A: Yes, the HP-42S had Wikipedia articles available in English, German, Spanish, French, Japanese, and Polish.

## Why It Matters
The HP-42S was significant in the evolution of programmable calculators, offering advanced RPN functionality that was crucial for engineers and scientists. Its introduction marked a step forward from the HP-41C, providing more capabilities for complex calculations. While it was eventually succeeded by the HP-28 series, the HP-42S played a pivotal role in the development of handheld computing devices, influencing later models in the field.

## Notable For
- **Programmability**: One of the first programmable RPN calculators, allowing users to store and execute custom programs.
- **Scientific Applications**: Designed for advanced mathematical and engineering calculations.
- **Evolution in Calculators**: Bridged the gap between the HP-41C and the HP-28 series, introducing new features.
- **Display Technology**: Utilized a liquid-crystal display, a common feature in later calculators.
- **Manufacturer**: Produced by Hewlett-Packard, a leading American technology company.

## Body
### Overview
The HP-42S was a programmable RPN scientific calculator developed by Hewlett-Packard. It succeeded the HP-41C and was followed by the HP-28 series, representing a significant step in the evolution of handheld computing devices.

### Technical Specifications
- **Display**: Liquid-crystal display
- **Programmability**: Allowed users to store and execute custom programs
- **Applications**: Designed for advanced mathematical and engineering calculations

### Historical Context
- **Predecessor**: HP-41C (programmable scientific RPN handheld calculator)
- **Successor**: HP-28 series (graphing calculators)
- **Manufacturer**: Hewlett-Packard, an American information technology company

### Wikipedia and Online Presence
- **Wikipedia Title**: HP-42S
- **Commons Category**: HP-42S
- **Wikipedia Languages**: Available in English, German, Spanish, French, Japanese, and Polish

## Schema Markup
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  "@type": "Thing",
  "name": "HP-42S",
  "description": "Programmable RPN Scientific hand held calculator by Hewlett Packard.",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q15241312",
    "https://en.wikipedia.org/wiki/HP-42S"
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  "additionalType": "Calculator"
}

## References

1. Freebase Data Dumps. 2013