| Abbreviation | Definition |
|---|---|
| K-SPS | KSC Shuttle Project Specification |
| KSSS | KSC (Kennedy Space Center) Station Set Specification |
| K-SSS | KSC (Kennedy Space Center) Shuttle project Station set Specification |
| K-SSS | KSC Shuttle Project Station Set Specification |
| K-STSM | KSC (Kennedy Space Center) Space Transportation System Management Plan/Requirement |
| K-STSM | KSC STS Plan/Requirement |
| K-STSN | KSC (Kennedy Space Center) Space Transportation System Notice |
| K-STSN | KSC STS Notice |
| KT | Kit |
| KT | Knots |
| KU | Keyboard Unit |
| KUSP | Ku-Band Signal Processor |
| KUSP | Ku-Band Single Processor |
| KV | KiloVolt |
| KVA | KiloVolt-Ampere |
| KWH | KiloWatt Hour |
| KYG | Yuri Gagarin, Russian ship designation, Spaceflight Tracking Data Network |
| KZ | Komisja Zakladowa |
| L | Landing Time |
| L | Launch |