Dictionaries, Thesauruses, Pictures, and Press Releases
- Nyquists criterion
- Nyström methods
- O notation
- OBJ
- object code
- object language
- object linking and embedding
- object management system
- object program
- object-oriented architecture
- object-oriented design
- object-oriented language
- object-space octree
- octal notation
- octree
- odd parity
- odd-even check
- odd-even rule
- odd-even transposition sort
- ODP