# XP/S4
**Wikidata**: [Q69788207](https://www.wikidata.org/wiki/Q69788207)  
**Source**: https://4ort.xyz/entity/xp-s4-q69788207

## Summary
XP/S4 is a supercomputer developed by Intel, running on the OSF/1 operating system. It achieved a peak performance of 2.8 gigaflops and was part of the TOP500 list with an ID of 741, featuring 56 processor cores.

## Key Facts
- **Instance of**: Supercomputer
- **Manufacturer**: Intel (American multinational technology company)
- **Operating system**: OSF/1 (variant of Unix)
- **Top500 system ID**: 741
- **Peak performance**: 2.8 gigaflops (Rpeak, 1994)
- **Maximum performance**: 1.75 gigaflops (Rmax, 1994)
- **Number of processor cores**: 56
- **Operating systems supported**: OSF/1 and Tru64 UNIX

## FAQs
### Q: What company manufactured XP/S4?
A: XP/S4 was manufactured by Intel, a leading American technology company specializing in semiconductors.

### Q: What operating systems did XP/S4 support?
A: XP/S4 ran on OSF/1, a Unix variant, and also supported Tru64 UNIX.

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

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

### Q: Where does XP/S4 rank in the TOP500 list?
A: XP/S4 was assigned the TOP500 system ID 741.

## Why It Matters
XP/S4 was a significant supercomputer in the 1990s, contributing to high-performance computing advancements. Its peak performance of 2.8 gigaflops and 56 processor cores made it a notable system for scientific and industrial applications. Running on OSF/1 and Tru64 UNIX, it supported Unix-based environments, aligning with the era's reliance on Unix for supercomputing. Its inclusion in the TOP500 list underscores its role in the evolution of high-performance computing infrastructure.

## Notable For
- **Peak performance**: Achieved 2.8 gigaflops (Rpeak) in 1994, a notable milestone for its time.
- **Processor cores**: Featured 56 cores, enhancing its computational capacity.
- **Operating systems**: Supported both OSF/1 and Tru64 UNIX, reflecting its compatibility with Unix-based systems.
- **TOP500 ranking**: Assigned ID 741, indicating its recognition in the supercomputing community.
- **Manufacturer**: Built by Intel, a pioneer in semiconductor technology.

## Body
### Overview
XP/S4 is a supercomputer manufactured by Intel, known for its performance and role in high-performance computing. It ran on OSF/1, a Unix variant, and supported Tru64 UNIX, reflecting its compatibility with Unix-based systems.

### Performance Metrics
- **Peak performance**: 2.8 gigaflops (Rpeak) in 1994.
- **Maximum performance**: 1.75 gigaflops (Rmax) in 1994.
- **Processor cores**: 56 cores, enhancing computational capacity.

### Operating Systems
- **Primary OS**: OSF/1, a Unix variant developed by the Open Software Foundation.
- **Secondary OS**: Tru64 UNIX, an operating system developed in the United States in 1992.

### Historical Context
- **TOP500 ranking**: Assigned system ID 741, indicating its position in the supercomputing hierarchy.
- **Manufacturer**: Intel, a leading American technology company specializing in semiconductors.

### Technical Specifications
- **Processor cores**: 56, contributing to its high-performance capabilities.
- **Performance metrics**: Recorded in 1993 and 1994, reflecting its advancements in computational power.

XP/S4 represents a key development in supercomputing, leveraging Intel's technology and Unix-based systems to achieve significant performance milestones.