ADOS may refer to: Computer operating systems Atari DOS, an 8-bit disk operating system used in Atari computers Arabic MS-DOS, from Microsoft Advanced DOS, a project name for IBM and Microsoft's OS/2 1.0 Access DOS, assistive software shipped with Microsoft's MS-DOS 6.2x ADOS (Russian operating system) (or АДОС), ca. 1989 Other uses Autism Diagnostic Observation Schedule, a diagnostic test American Descendants of Slavery, a descriptive term and political movement A Dream of Spring, a forthcoming novel in the A Song of Ice and Fire book series See also AOS (disambiguation) DOS (disambiguation)