SymbOS is a graphical user interface (GUI) based multitasking operating system for Z80 based supported home computers. SymbOS provides true multitasking and a complete windows like GUI. It supports up to 1024KB Ram for data and code execution and includes a FAT12/16/32 implementation.
If that wasn’t enough, SymbOS 3.0 is now network enabled! (TCP/IP)
The version 3.0 beta has just been released, and it is ready for testing. It is recommended to remove any previous version and performing a clean install.
There are many important changes on the beta release, but probably one of the most important is a complete and detailed PDF manual for SymbOS which is documenting and answering most things you might need to know.