Apple GS/OS

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GS/OS

The IIGS Finder running within GS/OS
Developer	Apple Computer
OS family	GS/OS
Working state	Historic
Source model	Closed source
Initial release	1988; 36 years ago (1988)
Latest release	GS/OS v4.02 (System Software 6.0.1) / May 6, 1993; 30 years ago (1993-05-06)
Kernel type	Monolithic kernel
License	Apple Software License Agreement

GS/OS is an operating system developed by Apple Computer for its Apple IIGS personal computer. It provides facilities for accessing the file system, controlling input/output devices, loading and running program files, and a system allowing programs to handle interrupts and signals. It uses ProDOS as its primary filing system. GS/OS is a component of Apple IIGS System Software versions 4.0 through 6.0.1, and was the first true 16-bit operating system for the IIGS.