# XP/S2
**Wikidata**: [Q69824541](https://www.wikidata.org/wiki/Q69824541)  
**Source**: https://4ort.xyz/entity/xp-s2-q69824541

## Summary
XP/S2 is a supercomputer manufactured by Intel that was listed on the TOP500 (ID 887). It ran Unix-family operating systems (notably OSF/1 and is also associated with Tru64 UNIX) and had 28 processor cores with measured performance around 0.87–0.88 gigaflops Rmax and a 1.4 gigaflops Rpeak (measurements dated 1994-06-01).

## Key Facts
- XP/S2 is an instance of a supercomputer.  
- Manufacturer: Intel (American technology company, founded 1968-07-18).  
- TOP500 system identifier: 887.  
- Number of processor cores: 28.  
- Reported Rmax performance: 0.88 gigaflops (point in time: 1994-06-01).  
- Reported alternate Rmax: 0.87 gigaflops (point in time: 1994-06-01).  
- Reported Rpeak performance: 1.4 gigaflops (point in time: 1994-06-01).  
- Operating system (listed): OSF/1 (a variant of the Unix operating system developed by the Open Software Foundation).  
- Also listed as requiring/running: Tru64 UNIX (operating system; inception 1992-01-01; country: United States).

## FAQs
### Q: What is XP/S2?
A: XP/S2 is a supercomputer produced by Intel and recorded on the TOP500 list with system ID 887. It had 28 processor cores and ran Unix-family operating systems such as OSF/1.

### Q: How fast was XP/S2?
A: Measured performance values dated 1994-06-01 list Rmax around 0.87–0.88 gigaflops and an Rpeak of 1.4 gigaflops.

### Q: Which operating system did XP/S2 use?
A: XP/S2 is listed as using OSF/1 and is also associated with Tru64 UNIX; OSF/1 is a Unix variant developed by the Open Software Foundation.

### Q: Who manufactured XP/S2?
A: Intel manufactured XP/S2. Intel is an American multinational technology company founded on 1968-07-18.

## Why It Matters
XP/S2 represents a historical example of Intel-built supercomputing hardware from the early-to-mid 1990s. Its inclusion on the TOP500 (ID 887) documents its role in the contemporary landscape of high-performance computing at that time. The system’s modest core count (28 cores) and sub-gigaflop Rmax values reflect the performance scale of machines before the rapid multi-core and petascale advances of later decades. XP/S2 also illustrates the use of Unix-family operating systems in supercomputing environments: it is recorded as running OSF/1 and is associated with Tru64 UNIX, showing the software stacks favored for parallel and scientific workloads in that period. For historians of computing and researchers tracking the evolution of HPC hardware and OS choices, XP/S2 is a concise data point linking Intel hardware, Unix-based operating systems, and TOP500 benchmarking in 1994.

## Notable For
- Manufactured by Intel, a major semiconductor and computing company.  
- TOP500 listing with system identifier 887.  
- Reported Rmax values of approximately 0.87–0.88 gigaflops and an Rpeak of 1.4 gigaflops (1994-06-01).  
- Small-scale parallel architecture by modern standards: 28 processor cores.  
- Use of Unix-family operating systems, notably OSF/1 and association with Tru64 UNIX.

## Body
### Overview
- XP/S2 is categorized as a supercomputer.
- The system is manufactured by Intel.
- It is recorded in TOP500 under system ID 887.

### Hardware specifications
- Number of processor cores: 28.
- Manufacturer: Intel.

### Performance and rankings
- TOP500 identifier: 887.
- Reported performance (point in time 1994-06-01):
  - Rmax: 0.88 gigaflops.
  - Alternate reported Rmax: 0.87 gigaflops.
  - Rpeak: 1.4 gigaflops.

### Operating system and software
- Operating system listed: OSF/1, a variant of Unix developed by the Open Software Foundation.
- XP/S2 is also listed as requiring or running Tru64 UNIX (operating system; inception 1992-01-01; country: United States).

### Manufacturer and related entities
- Manufacturer: Intel.
- Intel details present in source:
  - Inception (founding) date: 1968-07-18.
  - Country: United States.

### Identifiers
- TOP500 system id: 887.

(End of entry.)