TS-UGOS E1, or simply just TS-UGOS before 1986 or TS-UGOS 1 by fans (codenamed Metru), is a graphical operating system developed and released by Theorysonic. It was first released on July 15, 1985.
Theorysonic begin developing the TS-UGOS on October 1983. The beta version was released in October 1984.
- Theorynet web browser.
- Redesigned user interface into a 16-bit color look.