The Macintosh Operating System (Mac OS) was created to provide an operating system for the Macintosh computer.
Os Lusíadas was created in 1580.
Os Cariocas was created in 1942.
Os Maias was created in 1888.
Palm OS was created in 1996.
Os Trapalhões was created in 1977.
Os Fuzis was created in 1964.
Wombat OS was created in 2004.
Joli OS was created in 2008.
REX OS was created in 1999.
Os Sete was created in 1999.
Os Tarados was created in 1983.
Os Mutantes was created in 1966.