# XP/S4
**Wikidata**: [Q69817748](https://www.wikidata.org/wiki/Q69817748)  
**Source**: https://4ort.xyz/entity/xp-s4-q69817748

## 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 in 1994 and was part of the TOP500 list with an ID of 867. It featured 56 processor cores and was notable for its performance in scientific computing during its era.

## Key Facts
- **Instance of**: Supercomputer
- **Manufacturer**: Intel
- **Operating System**: OSF/1 (a variant of Unix)
- **TOP500 System ID**: 867
- **Peak Performance**: 2.8 gigaflops (Rpeak, 1994-11-01)
- **Maximum Performance**: 1.75 gigaflops (Rmax, 1994-11-01)
- **Number of Processor Cores**: 56
- **Runs on**: Tru64 UNIX (developed by the Open Software Foundation, first released in 1992)

## FAQs
### Q: What company manufactured the XP/S4 supercomputer?
A: The XP/S4 supercomputer was manufactured 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 featured 56 processor cores.

### Q: What was XP/S4's ranking in the TOP500 list?
A: XP/S4 was assigned the TOP500 system ID 867, indicating its position in the list of the world's most powerful supercomputers.

## Why It Matters
The XP/S4 supercomputer was significant in the early 1990s as a high-performance computing system capable of scientific and engineering simulations. Its peak performance of 2.8 gigaflops made it a notable entry in the TOP500 list, reflecting advancements in supercomputing technology during that era. Running on OSF/1 and Tru64 UNIX, it demonstrated the integration of Unix-based systems with high-performance computing. The XP/S4's 56 processor cores and its inclusion in the TOP500 system ID 867 highlight its role in pushing computational limits and supporting complex scientific research.

## Notable For
- **TOP500 Achievement**: XP/S4 was listed in the TOP500 with system ID 867, indicating its performance in the global supercomputing landscape.
- **High Performance**: It achieved a peak performance of 2.8 gigaflops (Rpeak) and a maximum performance of 1.75 gigaflops (Rmax) in 1994.
- **Processor Configuration**: The system featured 56 processor cores, contributing to its computational power.
- **Operating System Compatibility**: XP/S4 ran on OSF/1, a Unix variant, and was compatible with Tru64 UNIX, showcasing its integration with Unix-based systems.
- **Intel Manufacturing**: As a product of Intel, XP/S4 reflected the company's contributions to supercomputing technology.

## Body
### Overview
XP/S4 is a supercomputer manufactured by Intel, known for its performance in the early 1990s. It was part of the TOP500 list with system ID 867 and featured 56 processor cores.

### Performance Metrics
- **Peak Performance**: 2.8 gigaflops (Rpeak) recorded on November 1, 1994.
- **Maximum Performance**: 1.75 gigaflops (Rmax) recorded on the same date.
- **Performance in June 1994**: The system maintained similar performance metrics, with 2.8 gigaflops (Rpeak) and 1.75 gigaflops (Rmax).

### Operating System
- **Primary OS**: OSF/1, a Unix variant developed by the Open Software Foundation.
- **Compatibility**: Also compatible with Tru64 UNIX, which was first released in 1992.

### Manufacturer
- **Company**: Intel, an American multinational technology company founded in 1968.
- **Industry**: Intel operates in the semiconductor industry, with additional classification in the electrical industry.

### Historical Context
- **TOP500 Ranking**: XP/S4 was included in the TOP500 list, indicating its status as one of the world's most powerful supercomputers.
- **Processor Count**: The 56 processor cores contributed to its computational capabilities, reflecting advancements in supercomputing technology.