| Subject | English | Thesaurus |
| IT, abbr. | Operating System / Multiprogramming with a Variable number of Tasks | OSMVT (OS, IBM, S/360, S/370) |
| IT, abbr. | Operating System / Multiprogramming with a Variable number of Tasks | OS/MVT (OS, IBM, S/360, S/370) |
| IT, abbr. | Operating System Work Station | OSWS |