# IBM 709

> vacuum tube computer system

**Wikidata**: [Q548219](https://www.wikidata.org/wiki/Q548219)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/IBM_709)  
**Source**: https://4ort.xyz/entity/ibm-709

## Summary
The IBM 709 was a vacuum tube-based computer system developed by IBM in the late 1950s, serving as a general-purpose device for arithmetic and logical operations. It was part of IBM's 700/7000 series and succeeded the IBM 704, playing a key role in early scientific and commercial computing.

## Key Facts
- **Manufacturer**: IBM (American multinational technology corporation)
- **Inception**: January 1957
- **Service Entry**: August 1958
- **Based On**: IBM 704
- **Followed By**: IBM 7090
- **Operating Systems**: SHARE Operating System (1959), University of Michigan Executive System (1958), IBM 7090/94 IBSYS (early-to-mid 1960s)
- **Classification**: IBM mainframe, IBM platform, part of the IBM 700/7000 series
- **Technology**: Vacuum tube computer system

## FAQs
### Q: What was the IBM 709 used for?
A: The IBM 709 was a general-purpose computer designed for arithmetic and logical operations, primarily used in scientific and commercial applications during the late 1950s and early 1960s.

### Q: When was the IBM 709 released?
A: The IBM 709 was introduced in January 1957 and entered service in August 1958.

### Q: What operating systems did the IBM 709 support?
A: It supported several operating systems, including the SHARE Operating System (1959), the University of Michigan Executive System (1958), and IBM 7090/94 IBSYS (early-to-mid 1960s).

### Q: What technology did the IBM 709 use?
A: The IBM 709 was a vacuum tube-based computer system, a common technology for early mainframes before the transition to transistors.

### Q: What replaced the IBM 709?
A: The IBM 709 was succeeded by the IBM 7090, which was part of the same scientific computing lineage.

## Why It Matters
The IBM 709 was a significant milestone in the evolution of mainframe computing, bridging the gap between early vacuum tube systems and later transistor-based machines. As part of IBM's 700/7000 series, it contributed to advancements in scientific computing, business data processing, and operating system development. Its compatibility with multiple operating systems, including early versions like the SHARE OS, demonstrated the growing importance of software in computing. The IBM 709 also played a role in institutional computing, supporting research and commercial applications during a critical period of technological transition. Its legacy is reflected in subsequent IBM mainframes, which became foundational to enterprise and scientific computing for decades.

## Notable For
- **Early Mainframe**: One of IBM's key mainframe systems in the late 1950s, part of the influential 700/7000 series.
- **Vacuum Tube Technology**: Represented the peak of vacuum tube-based computing before the shift to transistors.
- **Operating System Support**: Compatible with multiple early operating systems, including SHARE OS and the University of Michigan Executive System.
- **Scientific Computing**: Widely used in scientific research and commercial data processing.
- **Precursor to IBM 7090**: Directly succeeded by the IBM 7090, continuing its role in high-performance computing.

## Body
### Overview
The IBM 709 was a vacuum tube computer system developed by IBM as part of its 700/7000 series of mainframes. It was designed for general-purpose computing, capable of performing arithmetic and logical operations for both scientific and commercial applications.

### Development and Release
- **Inception**: January 1957
- **Service Entry**: August 1958
- **Based On**: IBM 704, incorporating improvements in performance and functionality.
- **Manufacturer**: IBM, headquartered in Armonk, New York, USA.

### Technical Specifications
- **Technology**: Vacuum tube-based, a precursor to transistorized systems like the IBM 7090.
- **Operating Systems**:
  - SHARE Operating System (introduced 1959)
  - University of Michigan Executive System (introduced 1958)
  - IBM 7090/94 IBSYS (used in the early-to-mid 1960s)

### Legacy and Successors
- **Followed By**: IBM 7090, which replaced the vacuum tubes with transistors for improved reliability and performance.
- **Impact**: The IBM 709 contributed to the standardization of operating systems and the growth of institutional computing in research and business sectors.

### Classification
- **Instance Of**: IBM mainframe, IBM platform, computer, part of the IBM 700/7000 series.
- **Industry**: Computer industry, IT service management.

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## References

1. Freebase Data Dumps. 2013