# XP/S2
**Wikidata**: [Q69824309](https://www.wikidata.org/wiki/Q69824309)  
**Source**: https://4ort.xyz/entity/xp-s2

## Summary
XP/S2 is a supercomputer manufactured by Intel that ran the OSF/1 variant of the Unix operating system. It is recorded in Top500 with system ID 886 and had measured performance around 0.87–0.88 gigaflops (Rmax) and a peak of 1.4 gigaflops in June 1994.

## Key Facts
- XP/S2 is an instance of a supercomputer.
- Manufacturer: Intel (American multinational technology company; inception 1968-07-18).
- Operating system: OSF/1 (a variant of the Unix operating system developed by the Open Software Foundation).
- Related/required operating system class: Tru64 UNIX (listed as related).
- Top500 system identifier: 886.
- Measured performance (Rmax): 0.88 gigaflops (point in time: 1994-06-01).
- Measured performance (Rmax alternate record): 0.87 gigaflops (point in time: 1994-06-01).
- Theoretical peak performance (Rpeak): 1.4 gigaflops (point in time: 1994-06-01).
- Number of processor cores: 28.

## FAQs
### Q: What is XP/S2?
A: XP/S2 is a supercomputer built by Intel. It ran the OSF/1 Unix variant and appears in Top500 with system ID 886.

### Q: How fast was XP/S2?
A: Measured sustained performance (Rmax) for XP/S2 is recorded as about 0.87–0.88 gigaflops, with a theoretical peak (Rpeak) of 1.4 gigaflops, dated 1994-06-01.

### Q: How many processor cores did XP/S2 have?
A: XP/S2 had 28 processor cores.

### Q: Which operating systems did XP/S2 use?
A: XP/S2’s listed operating system is OSF/1. Tru64 UNIX is also listed as a related operating-system class.

## Why It Matters
XP/S2 is an example of early 1990s supercomputing hardware produced by a major semiconductor manufacturer, Intel. Its recorded performance figures and Top500 entry provide concrete data points for the historical performance and architecture of small-scale parallel systems of that era. With 28 processor cores and sub-1 gigaflop sustained performance, XP/S2 illustrates the performance envelope and design approaches before the multi-gigaflop and terascale transitions that followed later in the decade. For researchers, archivists, and historians of computing, XP/S2 is a verifiable instance linking hardware (Intel), operating-system choices (OSF/1, Tru64 class), and contemporary benchmarking (Top500, Rmax/Rpeak values dated 1994-06-01). These attributes make the system useful for comparative studies of hardware efficiency, OS integration, and the evolution of supercomputer rankings.

## Notable For
- Manufactured by Intel, a major semiconductor company, linking the system to commercial CPU vendor-built supercomputers.
- Official Top500 system entry with identifier 886.
- Documented sustained performance (Rmax) near 0.87–0.88 gigaflops and Rpeak of 1.4 gigaflops (measured 1994-06-01).
- Relatively small parallel configuration with 28 processor cores.

## Body
### Overview
- XP/S2 is classified as a supercomputer.
- The system is associated with Intel as its manufacturer.
- It is listed in Top500 under system ID 886.

### Hardware
- Number of processor cores: 28.
- Manufacturer: Intel.
- Performance metrics reported for the system date to 1994-06-01.

### Performance
- Rmax (sustained measured performance): 0.88 gigaflops (point in time: 1994-06-01).
- Alternate recorded Rmax: 0.87 gigaflops (point in time: 1994-06-01).
- Rpeak (theoretical peak performance): 1.4 gigaflops (point in time: 1994-06-01).

### Software / Operating System
- Operating system listed: OSF/1, a Unix variant developed by the Open Software Foundation.
- Tru64 UNIX is indicated as a related operating-system class.

### Identifiers and Classification
- Instance of: supercomputer.
- Top500 system ID: 886.

### Related organizations
- Manufacturer: Intel (inception 1968-07-18; United States).

(End of entry.)