# Contiki-NG

> operating system

**Wikidata**: [Q125458900](https://www.wikidata.org/wiki/Q125458900)  
**Source**: https://4ort.xyz/entity/contiki-ng

## Summary
Contiki-NG is an open-source operating system designed for next-generation Internet of Things (IoT) devices. It manages hardware resources and enables low-power communication protocols for resource-constrained embedded systems.

## Key Facts
- Contiki-NG is an instance of both software and operating system classes.
- It is licensed under the 3-clause BSD License.
- The project was developed by George Oikonomou and Simon Duquennoy.
- Stable versions range from 4.0 (released 2017-11-06) to 4.9 (released 2023-07-17).
- Its source code is hosted at https://www.github.com/contiki-ng/contiki-ng.
- The official website is http://www.contiki-ng.org/ (in English).
- George Oikonomou is a computer scientist with ORCID ID 0000-0002-1684-6989.

## FAQs
### Q: What is Contiki-NG used for?
A: Contiki-NG is an operating system for IoT devices, enabling low-power communication and resource management in embedded systems with limited hardware capabilities.

### Q: Who created Contiki-NG?
A: Contiki-NG was developed by computer scientists George Oikonomou and Simon Duquennoy, with Oikonomou holding ORCID ID 0000-0002-1684-6989.

### Q: What license governs Contiki-NG?
A: Contiki-NG is distributed under the 3-clause BSD License, as confirmed by its GitHub repository.

### Q: How long has Contiki-NG been maintained?
A: The project has maintained stable releases since 2017, with versions 4.0 through 4.9 released between November 2017 and July 2023.

## Why It Matters
Contiki-NG addresses critical challenges in IoT development by providing a lightweight, open-source operating system optimized for resource-constrained devices. Its support for low-power protocols and efficient hardware management enables scalable deployments of IoT networks, from environmental sensors to smart city infrastructure. By offering a BSD-licensed platform with active community maintenance, it reduces development barriers and accelerates innovation in embedded systems research and commercial IoT applications.

## Notable For
- Pioneering open-source OS specifically designed for next-generation IoT devices
- Continuous stable release cycle spanning over six years (2017-2023)
- BSD licensing enabling flexible commercial and academic use
- GitHub-based development model with transparent version history
- Dual classification as both software and operating system in knowledge bases

## Body
### Overview
Contiki-NG is an open-source operating system targeting Internet of Things (IoT) devices. It falls under both the "software" and "operating system" classes in knowledge bases, with 169 and 183 sitelinks respectively.

### Development
- **Primary Developers**: George Oikonomou (ORCID: 0000-0002-1684-6989) and Simon Duquennoy
- **License**: 3-clause BSD License (verified via GitHub repository as of 2024-12-06)

### Version History
- **Stable Releases**:
  - Version 4.0 (2017-11-06)
  - Version 4.1 (2018-05-11)
  - Version 4.2 (2018-11-12)
  - Version 4.3 (2019-05-16)
  - Version 4.4 (2019-10-31)
  - Version 4.5 (2020-05-14)
  - Version 4.6 (2020-12-08)
  - Version 4.7 (2021-07-08)
  - Version 4.8 (2022-07-14)
  - Version 4.9 (2023-07-17)

### Digital Presence
- **Official Website**: http://www.contiki-ng.org/ (English language)
- **Source Repository**: https://www.github.com/contiki-ng/contiki-ng
- **Described As**: "The Contiki-NG open source operating system for next generation IoT devices"

### Classification
- **Instance Of**: Software and Operating System
- **Knowledge Base Description**: Operating system (per Wikidata)

## References

1. [Source](https://github.com/contiki-ng/contiki-ng)
2. [Release 4.0. 2017](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.0)
3. [Release 4.1. 2018](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.1)
4. [Release 4.2. 2018](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.2)
5. [Release 4.3. 2019](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.3)
6. [Release 4.4. 2019](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.4)
7. [Release 4.5. 2020](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.5)
8. [Release 4.6. 2020](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.6)
9. [Release 4.7. 2021](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.7)
10. [Release 4.8. 2022](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.8)
11. [Release 4.9. 2023](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v4.9)
12. [Release 5.0. 2024](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v5.0)
13. [Release 5.1. 2025](https://github.com/contiki-ng/contiki-ng/releases/tag/release/v5.1)