RDOS

RDOS may refer to:


 * Regional District of Okanagan-Similkameen, a regional district of British Columbia
 * Data General RDOS, a real-time operating system by Data General since 1972
 * Cromemco RDOS, the resident operating system on some Cromemco S-100 cards
 * RDOS (Microsoft), a name sometimes used for the Russian versions of MS-DOS 4.01 and 5.00
 * RDOS (Ekblad), a 32-bit DOS-compatible operating system by Leif Ekblad since 1988