Ternary
- 3 (number)
- Balanced ternary
- Binary (disambiguation)
- Quaternary (disambiguation)
- Ternary Golay code
- Ternary complex
- Ternary compound
- Ternary computer
- Ternary form
- Ternary heap
- Ternary logic
- Ternary name
- Ternary numeral system
- Ternary operation
- Ternary plot
- Ternary relation
- Ternary search
- Ternary search tree
- Ternary signal
- Ternary tree
- Tertiary (disambiguation)