Thema Subject Categories 1.4

Previous versions of Thema are still available 1.3 1.2 1.1 1.0.

Browse the Thema subject categories hierarchy, or search for a specific term within the hierarchy.

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Notation Category heading Add Mod ?
U Computing and Information Technology
Use all U* codes for: academic, technical, specialist and some general adult titles. DO NOT USE: code ‘U’ itself, but select specific categories from section U*. Use all U* codes with: other subject categories and qualifiers where appropriate, in particular EDUCATIONAL PURPOSE 4* qualifiers for vocational educational titles
UL Operating systems
ULD Microsoft (Windows) operating systems
ULH Apple operating systems
Class here: mac OS, use with ULP to indicate iOS.
See also: ULP Mobile and other handheld operating systems
ULJ Open source and other operating systems
ULP Mobile and other handheld operating systems
Class here: Android, iOS, Blackberry, Tizen. Use for: mobile OS for phones, tablets and smart watches.
See also: ULD Microsoft (Windows) operating systems, ULH Apple operating systems
ULQ IBM mainframe operating systems
ULR Real time operating systems

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