# XP/S4
**Wikidata**: [Q69980197](https://www.wikidata.org/wiki/Q69980197)  
**Source**: https://4ort.xyz/entity/xp-s4-q69980197

## Summary
XP/S4 is a supercomputer manufactured by Intel that ran on the OSF/1 variant of the Unix operating system and later Tru64 UNIX. It featured 56 processor cores and achieved a performance of 1.75 gigaflops (Rmax) in November 1994.

## Key Facts
- **Instance of:** Supercomputer
- **Manufacturer:** Intel
- **Operating System:** OSF/1 (variant of Unix developed by the Open Software Foundation)
- **Operating System:** Tru64 UNIX
- **Top500 System ID:** 1214
- **Performance (Rmax):** 1.75 gigaflops (November 1994)
- **Performance (Rpeak):** 2.8 gigaflops (November 1994)
- **Number of Processor Cores:** 56

## FAQs
### Q: What operating system did XP/S4 run on?
A: XP/S4 ran on OSF/1, a variant of the Unix operating system developed by the Open Software Foundation, and later on Tru64 UNIX.
### Q: Who manufactured XP/S4?
A: XP/S4 was manufactured by Intel, the American multinational technology company.
### Q: What was XP/S4's performance ranking?
A: XP/S4 had a Top500 system ID of 1214 and achieved an Rmax performance of 1.75 gigaflops in November 1994.
### Q: How many processor cores did XP/S4 have?
A: XP/S4 was equipped with 56 processor cores.

## Why It Matters
XP/S4 represents a significant mid-1990s supercomputer design, notable for its Intel manufacturing and core specifications. It demonstrates the performance benchmarks and architectural choices common in supercomputing during that era, particularly its use of a Unix-based operating environment. Its inclusion in the Top500 list (ID 1214) solidifies its place as a recognized computing system of its time, providing a historical data point for analyzing the evolution of high-performance computing technology and Intel's involvement in the supercomputer market.

## Notable For
- Being a supercomputer manufactured by Intel during the mid-1990s.
- Utilizing the OSF/1 variant of the Unix operating system.
- Later operating on Tru64 UNIX.
- Featuring 56 processor cores.
- Achieving 1.75 gigaflops (Rmax) performance in November 1994.

## Body
### Overview
XP/S4 is classified as a supercomputer.

### Manufacturer and Components
- **Manufacturer:** Intel
- **Processor Cores:** 56

### Operating System
- **Primary OS:** OSF/1 (a variant of the Unix operating system developed by the Open Software Foundation)
- **Secondary OS:** Tru64 UNIX

### Performance Metrics
- **Rmax Performance:** 1.75 gigaflops (achieved November 1994)
- **Rpeak Performance:** 2.8 gigaflops (achieved November 1994)

### Recognition and Identification
- **Top500 System ID:** 1214
- **OSF/1 Significance:** OSF/1 was a Unix variant developed by the Open Software Foundation.
- **Tru64 UNIX Significance:** Tru64 UNIX is an operating system first introduced in 1992.