# Professional File System

> filesystem originally developed as non-free software for the Amiga, and now distributed on Aminet under the 4-clause BSD license.

**Wikidata**: [Q7247965](https://www.wikidata.org/wiki/Q7247965)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Professional_File_System)  
**Source**: https://4ort.xyz/entity/professional-file-system

## Summary
Professional File System (PFS) is a file system originally developed as non-free software for the Amiga platform. It is now distributed on Aminet under the 4-clause BSD license, making it available as free software.

## Key Facts
- Inception: 1995
- License: 4-clause BSD License
- Instance of: free software, file system
- Operating systems: AmigaOS, MorphOS
- Aliases: PFS, pfs3
- Source code repository: https://sourceforge.net/p/pfs-amiga/code/HEAD/tree/
- Wikipedia languages: de, en, hu
- Copyright status: copyrighted
- Freebase ID: /m/03ggcv
- Sitelink count: 3

## FAQs
### Q: What is Professional File System?
A: Professional File System (PFS) is a file system originally developed for the Amiga platform as non-free software. It is now available under the 4-clause BSD license and distributed on Aminet.

### Q: What operating systems support Professional File System?
A: Professional File System runs on AmigaOS and MorphOS, which is an Amiga-compatible computer operating system.

### Q: Where can I find the source code for Professional File System?
A: The source code for Professional File System is available on SourceForge at https://sourceforge.net/p/pfs-amiga/code/HEAD/tree/.

## Why It Matters
Professional File System represents an important piece of Amiga computing history, providing a robust file system solution for the platform. Its transition from non-free to free software under the 4-clause BSD license demonstrates the evolution of software licensing in the computing industry. The system's continued availability and maintenance through platforms like SourceForge and Aminet ensures that legacy Amiga users and enthusiasts can still access and use this technology. As a file system that runs on both AmigaOS and MorphOS, PFS helps maintain compatibility and functionality across different Amiga-compatible operating systems, preserving the ecosystem for users who continue to work with these platforms.

## Notable For
- Originally developed as non-free software for the Amiga platform
- Successfully transitioned to free software under the 4-clause BSD license
- Maintains compatibility with both AmigaOS and MorphOS operating systems
- Distributed through Aminet, a major repository for Amiga software
- Preserves legacy Amiga computing functionality through modern distribution channels

## Body
### Development History
Professional File System was initially created as proprietary software for the Amiga computing platform. The system was developed during the 1990s when Amiga computers were popular for both personal and professional use. Its original non-free status reflected the commercial software development practices of that era.

### Licensing Transition
The file system underwent a significant transition when it was relicensed under the 4-clause BSD license. This change made the software freely available to users and developers, allowing for broader distribution and modification. The 4-clause BSD license is known for its permissive nature, which has helped ensure the continued availability of PFS.

### Technical Specifications
As a file system, PFS provides the necessary structure for storing and organizing files on data storage devices. It is designed to work specifically with the Amiga's file system architecture, which differs from other operating systems like Windows or Unix-based systems. The system includes features necessary for managing files, directories, and storage allocation on Amiga-compatible hardware.

### Current Availability
Professional File System is now distributed through Aminet, which serves as a central repository for Amiga software. This distribution method ensures that users can still access and install PFS even on modern systems that support Amiga emulation or compatible operating systems like MorphOS. The availability through SourceForge also provides a modern platform for version control and source code access.