# MonaOS

> operating system

**Wikidata**: [Q3276752](https://www.wikidata.org/wiki/Q3276752)  
**Source**: https://4ort.xyz/entity/monaos

## Summary
MonaOS is an open-source operating system distinguished by its microkernel architecture. Written in C++, it is distributed under the permissive MIT License. The project is actively developed on GitHub, with its latest recorded release being version 0.3.4.

## Key Facts
- **Classification:** MonaOS is an operating system, open-source software, and a microkernel.
- **License:** The software is available under the **MIT License**.
- **Programming Language:** The system is written in **C++** (Wikidata ID: Q2407).
- **Latest Version:** Version **0.3.4** was released on **August 5, 2011**, and is marked as the preferred version.
- **Source Code:** The official repository is hosted at **github.com/higepon/mona**.
- **Aliases:** The project is also known as "Mona" and "モナ" (Japanese).
- **Website:** The official website is located at **monaos.org**.
- **Wikipedia Presence:** The project has Wikipedia articles in three languages: Japanese, Portuguese, and Swedish.

## FAQs
### Q: What type of architecture does MonaOS use?
A: MonaOS utilizes a **microkernel** architecture, which distinguishes it from monolithic operating systems by running services in user space.

### Q: Under what license is MonaOS distributed?
A: MonaOS is distributed as free software under the **MIT License**, allowing for broad modification and redistribution.

### Q: Where can the source code for MonaOS be found?
A: The source code is available in the official repository on **GitHub** at `https://github.com/higepon/mona`.

## Why It Matters
MonaOS is a significant technical project within the domain of hobbyist and educational operating systems. Its primary relevance lies in its implementation of a **microkernel** architecture written in **C++**, offering a practical example of non-monolithic OS design. Unlike proprietary or standard commercial systems, MonaOS is released under the **MIT License**, providing developers and researchers with transparent access to the codebase for study and modification.

The project demonstrates a structured release cycle, with specific versions tracked through 2010 and 2011. Its existence across multiple language Wikipedias (Japanese, Portuguese, Swedish) indicates a diverse, international interest in its development. By maintaining a dedicated web presence and open repository, MonaOS contributes to the body of knowledge regarding free software development and kernel design efficiency.

## Notable For
- **Microkernel Design:** Distinct from common monolithic kernels, emphasizing a minimal kernel space.
- **MIT Licensing:** Uses a permissive license that facilitates open contribution and usage.
- **C++ Implementation:** Leverages object-oriented programming for system-level operations.
- **Active Versioning:** Maintained a regular release schedule in late 2010 and 2011 (versions 0.3.1 through 0.3.4).
- **Multilingual Documentation:** Presence on Japanese, Portuguese, and Spanish Wikipedia indicates global accessibility.

## Body

### System Architecture and Development
MonaOS is an operating system based on a **microkernel** architecture. It is classified as both free software and open-source software. The system is programmed using **C++** (specifically identified as Wikidata item Q2407). The project emphasizes a lean design typical of microkernels, separating system services from the core kernel.

### Licensing and Status
The operating system is distributed under the **MIT License**, as referenced by its license page. While the system is designated as "copyrighted," its classification as free software allows for open usage and distribution.

### Release History
The development of MonaOS shows a distinct timeline of releases in the 0.3 series, hosted on GitHub:
- **0.3.1:** Released November 16, 2010.
- **0.3.2:** Released December 28, 2010.
- **0.3.3:** Released January 7, 2011.
- **0.3.4:** Released August 5, 2011 (Listed as the preferred/current stable release).

### Online Presence
MonaOS maintains an official website at `https://www.monaos.org/`. The project's source code is archived and available via GitHub under the user 'higepon'. The operating system has a global footprint, evidenced by Wikipedia sitelinks in Japanese (ja), Portuguese (pt), and Swedish (sv), with a total sitelink count of 3.

## References

1. [Source](https://www.monaos.org/license.html)
2. [Source](https://www.monaos.org/about.html)
3. [Release 0.3.1. 2010](https://github.com/higepon/mona/releases/tag/mona-0.3.1)
4. [Release 0.3.2. 2010](https://github.com/higepon/mona/releases/tag/mona-0.3.2)
5. [Release 0.3.3. 2011](https://github.com/higepon/mona/releases/tag/mona-0.3.3)
6. [Release 0.3.4. 2011](https://github.com/higepon/mona/releases/tag/mona-0.3.4)
7. Freebase Data Dumps. 2013