| Abbreviation | Definition |
|---|---|
| JX | Jacks |
| K | Knit |
| K | Kopkit |
| K&F | Knifes Forks |
| K&F | Knifes & Forks |
| KAAP | Kobe Aluminum Automotive Products |
| KABM | Knob Adjustable Boost Machine |
| KARR | Knight Automated Roving Robot |
| KB | Keeler Brass |
| KBE | King Bubble Expander |
| KBO | Kevlar Jeans Company |
| KCC | Kit Car Centre |
| KCP | Krishna Commercial Products |
| KDF | Kinetic Degradation Fluxion |
| KDR | Kokomo Double Rolled glass |
| KDS | Knee Deep Shag |
| KDV | Kwik Dry Van |
| KE | Kagayama Express |
| KEP | Kessler Ellis Products |
| KF | Kromische Figuren (German: Comic Figurine) |