Thema Subject Categories 1.3

Previous versions of Thema are still available 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 ?
F Fiction & Related items
Use with: (all F* codes) may be used with PLACE 1* and/or TIME PERIOD 3* Qualifiers where these aspects are particularly pertinent & significant; appropriate non-fiction codes may be added after F* codes to indicate specific central themes or topics in fiction
FL Science fiction
FLC Classic science fiction
Use for: science fiction widely regarded as ‘classic’ and typically published at least 50 years ago
FLG Science fiction: time travel
FLM Science fiction: steampunk
Class here: dieselpunk, retrofuturism. Use for: science fiction based on an alternative world where 19th century steam power has emerged as the dominant technology
FLP Science fiction: near-future 1.3
FLQ Science fiction: apocalyptic & post-apocalyptic 1.1
FLR Science fiction: military
Use for: science fiction set within the military or where organised use of weaponry is central to the plot. See also: FLS Science fiction: space opera
FLS Science fiction: space opera
Use for: science fiction set in space, usually with advanced cultures & technology
FLU Science fiction: aliens / UFOs
Class here: first contact, alien invasion
1.1 1.3
FLW Science fiction: space exploration
Class here: colonisation of space

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