# XP/S4
**Wikidata**: [Q69824115](https://www.wikidata.org/wiki/Q69824115)  
**Source**: https://4ort.xyz/entity/xp-s4-q69824115

## Summary
XP/S4 is a supercomputer developed by Intel, running on the OSF/1 operating system. It achieved peak performance of 2.8 gigaflops and was part of the TOP500 list of supercomputers in 1994.

## Key Facts
- **Instance of**: Supercomputer
- **Manufacturer**: Intel
- **Operating system**: OSF/1 (a variant of Unix)
- **TOP500 system ID**: 883
- **Peak performance**: 2.8 gigaflops (Rpeak, 1994-11-01)
- **Maximum performance**: 1.75 gigaflops (Rmax, 1994-11-01)
- **Number of processor cores**: 56
- **First performance measurement**: June 1994
- **Operating system compatibility**: Also supported Tru64 UNIX

## FAQs
### Q: What company built the XP/S4 supercomputer?
A: The XP/S4 supercomputer was built by Intel, an American multinational technology company.

### Q: What operating system did XP/S4 use?
A: XP/S4 ran on OSF/1, a variant of the Unix operating system developed by the Open Software Foundation.

### Q: What was the peak performance of XP/S4?
A: XP/S4 achieved a peak performance of 2.8 gigaflops (Rpeak) in November 1994.

### Q: How many processor cores did XP/S4 have?
A: XP/S4 was equipped with 56 processor cores.

### Q: When was XP/S4 first listed in the TOP500?
A: XP/S4 was assigned the TOP500 system ID 883, but the exact date of its inclusion is not specified in the source material.

## Why It Matters
The XP/S4 supercomputer was significant in the early 1990s as part of the growing supercomputing industry. It ran on OSF/1, a Unix variant, and achieved notable performance metrics, contributing to the development of high-performance computing. Its inclusion in the TOP500 list highlights its role in advancing computational capabilities during that era. While specific details about its deployment or applications are not provided, its performance and core count reflect the technological advancements of Intel and the broader supercomputing field at the time.

## Notable For
- **Peak performance**: Achieved 2.8 gigaflops (Rpeak) in 1994, demonstrating strong computational capabilities.
- **Processor cores**: Equipped with 56 cores, indicating a high level of parallel processing.
- **Operating system**: Ran on OSF/1, a Unix variant, showcasing compatibility with industry-standard systems.
- **TOP500 inclusion**: Assigned system ID 883, reflecting its recognition in the supercomputing community.
- **Early performance metrics**: Recorded performance measurements as early as June 1994, contributing to the evolution of high-performance computing.

## Body
### Overview
XP/S4 is a supercomputer manufactured by Intel, known for its performance and inclusion in the TOP500 list. It operated on OSF/1, a Unix-based operating system, and was also compatible with Tru64 UNIX.

### Performance Metrics
- **Peak performance**: 2.8 gigaflops (Rpeak) in November 1994.
- **Maximum performance**: 1.75 gigaflops (Rmax) in November 1994.
- **Early performance**: Recorded performance metrics as early as June 1994.

### Technical Specifications
- **Processor cores**: 56 cores, enabling high parallel processing.
- **TOP500 ID**: Assigned system ID 883, indicating its position in the supercomputing rankings.

### Operating System
- **Primary OS**: OSF/1, a Unix variant developed by the Open Software Foundation.
- **Compatibility**: Also supported Tru64 UNIX, an operating system developed in 1992 by Digital Equipment Corporation (now part of Hewlett-Packard Enterprise).

### Context
- **Manufacturer**: Intel, a leading American technology company specializing in semiconductors and electronics.
- **Industry role**: XP/S4 reflects Intel's contributions to the supercomputing industry in the 1990s.