SymbOS

SYmbiosis Multitasking Based Operating System

SymbOS is a multitasking operating system with a graphical user interface for Z80-based home computers. It provides a Windows-like GUI and is built around a microkernel with preemptive multitasking.

It supports up to 1024KB RAM for data and code execution and includes a FAT12/16/32 filesystem implementation for accessing data storage of up to 2 Terabytes. Since version 3.0, SymbOS is fully network-enabled.

Sam Coupé support started in September 2026.