# EPOC

> operating system

**Wikidata**: [Q200647](https://www.wikidata.org/wiki/Q200647)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/EPOC_(operating_system))  
**Source**: https://4ort.xyz/entity/epoc

## Summary
EPOC is a mobile operating system developed by Psion and first published in 1989. It is classified as a mobile operating system and replaced the earlier SIBO platform; it is associated with a set of EPOC-specific readable file formats and is documented under the Wikipedia title "EPOC (operating system)."

## Key Facts
- EPOC is an operating system and is classified as a mobile operating system.
- Developer: Psion.
- Publication date: 1989.
- EPOC replaced the SIBO platform.
- Platform identifier (structured property): Q182933.
- Readable file formats associated with EPOC include EPOC Application Information File; Psion Record/EPOC voice audio; EPOC OPL object module; EPOC OPL source; EPOC OPL eXtension; EPOC Word document; EPOC/Psion Sheet spreadsheet; EPOC Data database; EPOC data store (gen); and EPOC Data (gen).
- Wikidata description: operating system.
- Wikipedia title for the entity: "EPOC (operating system)" and it has sitelink_count: 13.
- Aliases include the Japanese term オペレーティングシステム.
- Identifiers: yso_id 8556; freebase_id /m/0n8_mmf; uvl_platform_id 127.

## FAQs
### Q: What is EPOC?
A: EPOC is a mobile operating system developed by Psion, first published in 1989. It is documented under the Wikipedia title "EPOC (operating system)."

### Q: Who developed EPOC?
A: EPOC was developed by the company Psion.

### Q: When was EPOC first published?
A: EPOC was published in 1989.

### Q: What platform or system did EPOC replace?
A: EPOC replaced the SIBO platform.

### Q: What file formats are associated with EPOC?
A: Associated readable file formats include EPOC Application Information File, Psion Record/EPOC voice audio, multiple EPOC OPL formats (object module, source, eXtension), EPOC Word document, EPOC/Psion Sheet spreadsheet, and several EPOC Data and data store formats.

## Why It Matters
EPOC matters as a documented mobile operating system developed by Psion and introduced in 1989. As an instance of a mobile OS, it represents a distinct platform implementation and a successor to the earlier SIBO environment. The presence of multiple EPOC-specific readable file formats (applications, voice audio, OPL source/object formats, documents, spreadsheets, and data stores) indicates that EPOC functioned as a platform with its own application and data ecosystem. Its structured identifiers (such as yso_id, freebase_id, and uvl_platform_id) and dedicated Wikipedia entry show that EPOC is a recognized entity within software and digital-heritage records. For researchers, archivists, or developers studying the evolution of mobile operating systems or handling legacy mobile content, EPOC is relevant because of its distinct formats, platform identity, and place in the lineage of mobile OS implementations.

## Notable For
- Developed by Psion and published in 1989, establishing it as a mobile operating system from that period.
- Replacement of the earlier SIBO platform, indicating a platform transition.
- A defined set of EPOC-specific readable file formats covering applications, voice audio, OPL code, documents, spreadsheets, and data stores.
- Multiple structured identifiers and a dedicated Wikipedia title ("EPOC (operating system)"), reflecting documented recognition in reference databases.

## Body
### Identity and classification
- Instance of: mobile operating system.
- Wikidata description: operating system.
- Wikipedia title: EPOC (operating system).
- Aliases: オペレーティングシステム (Japanese).

### Development and publication
- Developer: Psion.
- Publication date: 1989.

### Platform and relationships
- Platform property recorded as Q182933.
- EPOC replaced the earlier platform SIBO (replacement relationship explicitly recorded).

### File formats and data types
- Readable file formats associated with EPOC include:
  - EPOC Application Information File
  - Psion Record / EPOC voice audio
  - EPOC OPL object module
  - EPOC OPL source
  - EPOC OPL eXtension
  - EPOC Word document
  - EPOC / Psion Sheet spreadsheet
  - EPOC Data database
  - EPOC data store (gen)
  - EPOC Data (gen)

### Identifiers and metadata
- yso_id: 8556.
- freebase_id: /m/0n8_mmf.
- uvl_platform_id: 127.
- sitelink_count: 13.
- Recorded languages on Wikipedia for the topic: cs, de, en, fi, it, nl, pl, pt, ru, sv.

## References

1. Freebase Data Dumps. 2013
2. YSO-Wikidata mapping project