GEOS-SC
GEOS-SC was a 32-bit RISC-CPU smartphone OS & GUI for the Japanese cellphone-market. It was released in 1997. Originally built as Geoworks' planned future OS and codenamed 'Liberty' GEOS-SC became the basis for cellphones designed by Mitsubishi Electric Company of Japan (MELCO).
Read more about this topic: GEOS (16-bit Operating System)