Syllable is a free and open source operating system for Pentium and compatible processors. Its purpose is to create an easy-to-use desktop operating system for the home and small office user. It was forked from the stagnant AtheOS in July 2002.

It has a native web browser (Webster which is WebKit-based), email client (Whisper), media player, IDE, and many more applications.

Features according to the official website include:

  • Native 64-bit journaled file system, the AtheOS File System (usually called AFS, which is not the same as the Andrew File System)
  • C++ oriented API
  • Object-oriented graphical desktop environment on a native GUI architecture
  • Mostly POSIX compliant

GNU toolchain (GCC, Glibc, Binutils, Make)

  • Pre-emptive multitasking with multithreading
  • Symmetric multiprocessing (multiple processor) support
  • Device drivers for most common hardware (video, sound, network chips)
  • File system drivers for FAT (read/write), NTFS (read) and ext2 (read)
  • REBOL as system scripting language

The latest version is 0.6.6, released on May 15, 2009.

Version Processor Memory Hard drive capacity Video card
Required Recommended Required Recommended Required Recommended Required Recommended

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