# XP/S4
**Wikidata**: [Q69823889](https://www.wikidata.org/wiki/Q69823889)  
**Source**: https://4ort.xyz/entity/xp-s4

## 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 a maximum performance of 1.75 gigaflops in 1994, featuring 56 processor cores and ranking in the TOP500 list.

## Key Facts
- **Instance of**: Supercomputer
- **Manufacturer**: Intel
- **Operating system**: OSF/1 (variant of Unix)
- **TOP500 system ID**: 882
- **Peak performance**: 2.8 gigaflops (Rpeak, 1994)
- **Maximum performance**: 1.75 gigaflops (Rmax, 1994)
- **Processor cores**: 56
- **Performance metrics recorded**: June and November 1994

## FAQs
### Q: What company built the XP/S4 supercomputer?
A: The XP/S4 was developed 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 were XP/S4's performance metrics?
A: In 1994, XP/S4 achieved a peak performance of 2.8 gigaflops (Rpeak) and a maximum performance of 1.75 gigaflops (Rmax).

### 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 is listed as system ID 882 in the TOP500 supercomputer rankings.

## Why It Matters
XP/S4 was a significant supercomputer in the late 1990s, contributing to computational advancements in scientific and industrial applications. Its performance metrics, including a peak of 2.8 gigaflops, reflected the capabilities of early high-performance computing systems. Running on OSF/1, it demonstrated Intel's role in developing powerful computing solutions. While no longer a cutting-edge system, XP/S4 remains a historical benchmark in the evolution of supercomputing technology.

## Notable For
- **TOP500 ranking**: Listed as system ID 882, highlighting its position among high-performance computing systems.
- **Performance metrics**: Achieved 2.8 gigaflops (Rpeak) and 1.75 gigaflops (Rmax) in 1994, showcasing its computational power.
- **Processor cores**: Equipped with 56 cores, indicating its advanced architecture for the time.
- **Operating system**: Ran on OSF/1, a Unix variant, reflecting its compatibility with industry-standard software.
- **Manufacturer**: Built by Intel, a leading technology company, demonstrating its role in supercomputing innovation.

## Body
### Overview
XP/S4 is a supercomputer developed by Intel, known for its performance in the late 1990s. It operated on the OSF/1 operating system, a variant of Unix, and was listed in the TOP500 supercomputer rankings under ID 882.

### Performance
XP/S4 achieved a peak performance of 2.8 gigaflops (Rpeak) and a maximum performance of 1.75 gigaflops (Rmax) in 1994. These metrics were recorded in both June and November of that year, reflecting its computational capabilities during that period.

### Architecture
The supercomputer featured 56 processor cores, indicating its advanced architecture for high-performance computing. This configuration contributed to its ability to handle complex computational tasks efficiently.

### Operating System
XP/S4 ran on OSF/1, a Unix-based operating system developed by the Open Software Foundation. This choice of OS ensured compatibility with industry-standard software and tools.

### Manufacturer
Intel, a prominent American technology company, manufactured XP/S4. Intel's involvement in supercomputing highlighted its role in advancing high-performance computing solutions.

### Historical Context
XP/S4 was a notable system in the late 1990s, contributing to the evolution of supercomputing technology. While no longer a state-of-the-art system, it remains a historical benchmark in the field.