| Abbreviation | Definition |
|---|---|
| K | Cathode |
| K | Electromechanical Relay |
| K | Kathode |
| KA | A Kurupted Angelz |
| KAC | Kerbal Alarm Clock |
| KAEC | Kaiser Aerospace and Electronics Corporation |
| KAEC | Kentucky Association of Electric Cooperatives |
| KAIC | Kilo-Ampere Interrupting Capacity |
| KAIC | Thousand Ampere Interrupting Capacity |
| KAPER | Kite Aerial Photography Electronic Resources |
| Kb | Kilobits |
| KB | KiloByte |
| KCL | Kirchoff's Current Law |
| KCT | Krell Current Tunnel |
| KDC | Kodak Digital Camera image format |
| KEA | Kodiak Electric Association |
| KEA | Kotzebue Electric Association |
| KEC | Kansas Electric Cooperatives |
| KEC | Kootenai Electric Cooperative |
| KECS | Kawasaki Electronic Control Suspension |