# IBM PC DOS

> discontinued computer operating system

**Wikidata**: [Q863568](https://www.wikidata.org/wiki/Q863568)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/IBM_PC_DOS)  
**Source**: https://4ort.xyz/entity/ibm-pc-dos

## Summary
IBM PC DOS was a discontinued computer operating system developed by IBM for IBM personal computers. It was based on 86-DOS and later versions of MS-DOS, serving as the primary operating system for IBM PCs from 1981 until its discontinuation in 1998.

## Key Facts
- Inception: 1981-08-00
- Developer: IBM
- Discontinuation date: 1998-04-00
- Latest version: IBM PC DOS 2000 (1998)
- License: Proprietary license
- Based on: 86-DOS
- Platform: IBM PC compatible computers
- Distribution formats: 5¼-inch floppy disk, 3½-inch floppy disk, CD-ROM
- Programming language: Assembly language
- Instance of: DOS, operating system

## FAQs
### Q: What is IBM PC DOS?
A: IBM PC DOS was a discontinued computer operating system developed by IBM for IBM personal computers. It was based on 86-DOS and later versions of MS-DOS, serving as the primary operating system for IBM PCs from 1981 until its discontinuation in 1998.

### Q: When was IBM PC DOS discontinued?
A: IBM PC DOS was discontinued in April 1998, with the final version being IBM PC DOS 2000 released that same year.

### Q: What platforms did IBM PC DOS run on?
A: IBM PC DOS ran on IBM PC compatible computers, which were based on the IBM PC architecture. It was distributed on 5¼-inch floppy disks, 3½-inch floppy disks, and CD-ROMs.

## Why It Matters
IBM PC DOS played a crucial role in the early personal computer revolution by providing the operating system for IBM's influential PC line. As one of the first widely adopted PC operating systems, it helped establish standards for software compatibility and hardware interfaces that shaped the entire PC industry. The operating system's development and distribution model, which involved licensing to other manufacturers, contributed to the proliferation of "IBM-compatible" computers and helped create the foundation for the modern PC ecosystem. Its influence extended beyond IBM's own hardware, as it competed with and complemented other DOS variants, ultimately contributing to the standardization of PC software development.

## Notable For
- Being the official operating system for IBM's influential PC line
- Establishing early PC software standards and compatibility
- Competing with and complementing other DOS variants
- Contributing to the proliferation of "IBM-compatible" computers
- Playing a key role in the standardization of PC software development

## Body
### Development and History
IBM PC DOS was developed by IBM as the operating system for their personal computer line, beginning in 1981. The operating system was based on 86-DOS, an early version of Seattle Computer Products' operating system that later evolved into MS-DOS. IBM licensed the technology and adapted it for their hardware platform.

### Technical Specifications
The operating system was written primarily in assembly language, allowing for efficient use of system resources and direct hardware access. It utilized a command-line interface and was distributed on various media including 5¼-inch and 3½-inch floppy disks, as well as CD-ROMs in later versions.

### Versions and Evolution
IBM PC DOS went through multiple versions throughout its lifetime, with the final version being IBM PC DOS 2000 released in 1998. Each version brought improvements in functionality, compatibility, and performance, though the core architecture remained similar to the original release.

### Relationship to Other Operating Systems
While IBM PC DOS was based on 86-DOS and shared many similarities with MS-DOS, it maintained its own development path and feature set. The operating system competed with other DOS variants while also contributing to the overall standardization of PC software.

### Legacy and Impact
Although discontinued in 1998, IBM PC DOS's influence continued through its role in establishing PC standards and compatibility guidelines. Its development model and licensing approach helped shape the broader PC industry and contributed to the success of the IBM PC platform.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "IBM PC DOS",
  "description": "Discontinued computer operating system developed by IBM for IBM personal computers",
  "url": "https://en.wikipedia.org/wiki/IBM_PC_DOS",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q47604"
  ],
  "additionalType": "operating system"
}

## References

1. Virtual International Authority File
2. Freebase Data Dumps. 2013