# SR-52
**Wikidata**: [Q2799046](https://www.wikidata.org/wiki/Q2799046)  
**Source**: https://4ort.xyz/entity/sr-52

## Summary
The SR-52 is a programmable pocket calculator model manufactured by the American semiconductor company Texas Instruments. It is characterized by its integrated magnetic card reader, which allows users to read and write data using small, magnetizable plastic storage cards.

## Key Facts
- **Manufacturer:** Texas Instruments (an American multinational semiconductor company founded in 1930).
- **Instance Of:** Calculator model.
- **Country of Origin:** United States.
- **Key Component:** Integrated magnetic card reader.
- **Storage Media:** Magnetic storage cards (thin, elongated plastic cards with a magnetizable layer).
- **Successor:** Succeeded by the TI-59 programmable calculator in 1977.
- **Manufacturer Headquarters:** Dallas, Texas.

## FAQs
### Q: What is the primary function of the SR-52?
A: The SR-52 is a programmable pocket calculator designed for complex calculations. It features a built-in magnetic card reader that allows for the storage and retrieval of data and programs on portable magnetic cards.

### Q: Who produced the SR-52?
A: The SR-52 was produced by Texas Instruments, a major electronics and semiconductor manufacturer based in the United States.

### Q: How does the SR-52 store data?
A: It uses magnetic storage cards, which are small, thin plastic strips with a magnetizable layer. These cards were a standard technology for programmable calculators during the 1970s and 1980s.

### Q: What model followed the SR-52?
A: The SR-52 was succeeded by the TI-59, another programmable calculator with a magnetic card reader that Texas Instruments began producing in 1977.

## Why It Matters
The SR-52 is a significant example of the evolution of portable computing and programmable electronics. Produced by Texas Instruments, a leader in the semiconductor industry, the device integrated magnetic storage technology into a handheld format. By utilizing magnetic storage cards—a technology that emerged in the mid-1970s—the SR-52 allowed users to save and reload complex programs, moving beyond the limitations of volatile memory. This capability made it a precursor to more advanced programmable systems and established a design lineage that led to the TI-59. Its development reflects the broader transition in the 1970s from simple arithmetic tools to sophisticated, user-programmable pocket computers.

## Notable For
- **Integrated Magnetic Card Reader:** A built-in device for reading and writing data on external media.
- **Magnetic Card Compatibility:** Utilizes specialized thin plastic cards with magnetizable layers for data storage.
- **Texas Instruments Heritage:** Part of the early calculator lineup from one of the world's largest semiconductor companies.
- **Technological Predecessor:** Served as the functional precursor to the TI-59 model released in 1977.

## Body

### Manufacturer Overview
The SR-52 was manufactured by Texas Instruments (TI), an American multinational semiconductor design and manufacturing company. Founded on December 6, 1930, and headquartered in Dallas, Texas, TI became a dominant force in the electronics and calculator industries.

### Technical Specifications and Storage
The SR-52 is classified as a programmable pocket calculator. Its most distinctive feature is the magnetic card reader, a device designed to interface with magnetic storage cards. These cards, which came into use around 1974, are small, thin, elongated plastic cards featuring a magnetizable layer. This system provided a method for non-volatile data storage, allowing users to preserve programs and data outside of the calculator's internal memory.

### Product Lineage
In the history of Texas Instruments' calculator development, the SR-52 occupies a position prior to the TI-59. The TI-59, which also featured a magnetic card reader, was produced starting in 1977 and served as the successor to the SR-52. Both devices were part of a specialized category of calculators that bridged the gap between standard electronic calculators and early personal computers.

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