| Answer | Crossword Clue |
|---|---|
| subset | a mathematical set contained within a larger set |
| subsets | SUBSET, a mathematical set contained within a larger set |
| subgraph | a graph contained within a larger graph |
| subgraphs | SUBGRAPH, a graph contained within a larger graph |
| subsystems | A self-contained system within a larger system |
| subsystem | A self-contained system within a larger system |
