| K | Potassium | - | Business and Finance |
| K | A Symbol For Planetary Wave Number | - | Business and Finance |
| KAEH | King Air Equivalent Hours | - | Business and Finance |
| KAFB | Kirkland Air Force Base | - | Business and Finance |
| KB | Kilobyte (s) | - | Business and Finance |
| KB | Kilobit(s) | - | Business and Finance |
| KB/S | Kbits/s | - | Business and Finance |
| KBPS | Kilobits (103) Per Second | - | Business and Finance |
| KBYTE | Kilobyte (103) | - | Business and Finance |
| KDP | Potassium Dihydrogen Phosphate | - | Business and Finance |
| KE | Kinetic Energy | - | Business and Finance |
| KELP | Coronal Emission Line Polarimeter | - | Business and Finance |
| KISS | Kanton Island Sounding System | - | Business and Finance |
| KITOON | Combination Kite And Balloon | - | Business and Finance |
| KLOC | Kilolines (103) Of Code | - | Business and Finance |
| KMA | Korean Meteorological Administration | - | Business and Finance |
| KNET/SPARTACUS | N/A | - | Business and Finance |
| KNMI | Koninklijk Nederlands Meteorologisch Instituut | - | Business and Finance |
| KOFSE | Kuwait Oil-Fire Smoke Experiment | - | Business and Finance |
| KOSAMP | Kuwait Oil-Fire Smoke Atmospheric Measurements Program | - | Business and Finance |
| KP | Low Magnetic Activity | - | Business and Finance |
| KP | Geomagnetic Planetary Index | - | Business and Finance |
| KPNO | Kitt Peak National Observatory Arizona | - | Business and Finance |
| KPP | K Profile Parameterization | - | Business and Finance |
| KR | Kilorayleigh | - | Business and Finance |
| KRMS | Ka-band Radiometer Mapping System | - | Business and Finance |
| KSA | Ku-band Single Access | - | Business and Finance |
| KSC | Kennedy Space Center | - | Business and Finance |
