# RT-11

> single-user real-time operating system for DEC PDP-11 minicomputers

**Wikidata**: [Q305216](https://www.wikidata.org/wiki/Q305216)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/RT-11)  
**Source**: https://4ort.xyz/entity/rt-11

## Summary  
RT-11 is a single-user, real-time operating system developed by Digital Equipment Corporation (DEC) for PDP-11 minicomputers. It was introduced in 1970 and is written primarily in assembly language. RT-11 is notable for its simplicity and efficiency in managing hardware resources for real-time applications.

## Key Facts  
- **Developer**: Digital Equipment Corporation (DEC)  
- **Inception**: 1970  
- **Platform**: PDP-11 minicomputers  
- **Programming Language**: Assembly language  
- **License**: Proprietary  
- **Instance of**: Operating system  
- **Derivative Work**: TSX-Plus  
- **Copyright Status**: Copyrighted  
- **Language of Work**: English  
- **Sitelink Count**: 10 (across Wikipedia languages)  

## FAQs  
### Q: What type of operating system is RT-11?  
A: RT-11 is a single-user, real-time operating system designed for DEC PDP-11 minicomputers. It manages hardware resources efficiently for real-time applications.  

### Q: Who developed RT-11?  
A: RT-11 was developed by Digital Equipment Corporation (DEC), an American manufacturer known for its minicomputers and information technology innovations.  

### Q: What programming language was RT-11 written in?  
A: RT-11 was written primarily in assembly language, which provides strong correspondence between instructions and machine code for optimal performance.  

## Why It Matters  
RT-11 played a significant role in the early days of computing by providing a reliable and efficient operating system for PDP-11 minicomputers. Its real-time capabilities made it ideal for industrial control, scientific research, and embedded systems. The system's simplicity and performance set a benchmark for subsequent operating systems, influencing the development of derivatives like TSX-Plus. RT-11 also contributed to DEC's reputation as a leader in minicomputer technology during the 1970s and 1980s.  

## Notable For  
- **Real-Time Capabilities**: Optimized for time-sensitive applications.  
- **Single-User Design**: Simplified resource management for dedicated tasks.  
- **Assembly Language Implementation**: Ensured high performance and hardware efficiency.  
- **Derivative Influence**: Inspired TSX-Plus and other systems.  
- **DEC Legacy**: Strengthened DEC's position in the minicomputer market.  

## Body  
### Development and Release  
- Developed by Digital Equipment Corporation (DEC) in 1970.  
- Targeted specifically for PDP-11 minicomputers.  

### Technical Specifications  
- **Programming Language**: Assembly language for low-level efficiency.  
- **License**: Proprietary, limiting modifications and redistribution.  
- **Platform**: Exclusively designed for PDP-11 hardware.  

### Derivatives and Legacy  
- **TSX-Plus**: A derivative operating system built upon RT-11's foundation.  
- **Influence**: Set standards for real-time operating systems in industrial and scientific applications.  

### Cultural and Historical Impact  
- Contributed to DEC's dominance in the minicomputer sector.  
- Used widely in real-time computing applications during its era.

## References

1. Freebase Data Dumps. 2013
2. BabelNet