# Cray Operating System

> operating system

**Wikidata**: [Q844259](https://www.wikidata.org/wiki/Q844259)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Cray_Operating_System)  
**Source**: https://4ort.xyz/entity/cray-operating-system

## Summary
The Cray Operating System (COS) is a supercomputer operating system developed by Cray and Hewlett Packard Enterprise (HPE). It was based on SUSE Linux Enterprise Server and was designed specifically for use on supercomputers. COS was later replaced by UNICOS, marking its retirement from active use.

## Key Facts
- **Instance of**: Operating system, supercomputer operating system
- **Developed by**: Cray and Hewlett Packard Enterprise
- **Based on**: SUSE Linux Enterprise Server
- **Replaced by**: UNICOS
- **Copyright status**: Public domain
- **Wikipedia availability**: Available in German, English, Italian, and Russian
- **Wikidata description**: Operating system
- **Aliases**: HPE Cray OS, COS, Cray OS

## FAQs
### Q: What was the Cray Operating System used for?
A: The Cray Operating System was designed specifically for supercomputers, managing hardware resources and enabling high-performance computing tasks.

### Q: Who developed the Cray Operating System?
A: The Cray Operating System was developed by Cray and Hewlett Packard Enterprise (HPE), with its foundation built on SUSE Linux Enterprise Server.

### Q: What replaced the Cray Operating System?
A: The Cray Operating System was replaced by UNICOS, which continued to serve as a supercomputer operating system.

### Q: Is the Cray Operating System still in use?
A: No, the Cray Operating System is no longer in active use, having been succeeded by UNICOS.

### Q: What is the copyright status of the Cray Operating System?
A: The Cray Operating System is in the public domain, meaning it is freely available for use and modification.

## Why It Matters
The Cray Operating System played a crucial role in the evolution of supercomputing by providing a specialized operating system tailored to the needs of high-performance computing. Developed by Cray and Hewlett Packard Enterprise, it was based on SUSE Linux Enterprise Server, ensuring stability and compatibility. Its retirement marked a transition to UNICOS, which continued to support supercomputing advancements. The Cray Operating System's development highlighted the collaborative efforts between industry leaders in pushing the boundaries of computational power and efficiency.

## Notable For
- **Specialized for supercomputers**: Designed specifically for high-performance computing tasks.
- **Collaborative development**: Developed jointly by Cray and Hewlett Packard Enterprise.
- **Public domain status**: Freely available for use and modification.
- **Transition to UNICOS**: Marked the shift to a more advanced supercomputer operating system.
- **Multilingual documentation**: Available in multiple languages, including German, English, Italian, and Russian.

## Body
### Overview
The Cray Operating System (COS) was a supercomputer operating system developed by Cray and Hewlett Packard Enterprise (HPE). It was based on SUSE Linux Enterprise Server and was designed to manage hardware resources and support high-performance computing tasks.

### Development and Replacement
COS was developed in collaboration between Cray and HPE, leveraging the stability and features of SUSE Linux Enterprise Server. It was later replaced by UNICOS, which continued to serve as a supercomputer operating system. This transition marked the end of COS's active use.

### Availability and Documentation
The Cray Operating System was available in the public domain, allowing for free use and modification. Its documentation was available in multiple languages, including German, English, Italian, and Russian, making it accessible to a global audience.

### Significance
COS played a significant role in the supercomputing industry by providing a specialized operating system tailored to the needs of high-performance computing. Its development and eventual replacement by UNICOS highlighted the continuous evolution of supercomputer operating systems.

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## References

1. Freebase Data Dumps. 2013