| Abbreviation | Definition |
|---|---|
| KLE | Kingsley Library Equipment |
| KLL | K Linnemann Library |
| KLN | Kentucky Library Network |
| KLN | Keystone Library Network |
| KLNB | Kansas LIbrary Network Board |
| KM | Knowledge Management |
| KNLS | Kenya National Library Services |
| KOL | Key Objects Library |
| KOLL | Kindle Owners Lending Library |
| KOLT | Kernel Object Library for Threads |
| KOS | knowledge organization system(s) |
| KosmBiolAviakMed | Kosmicheskaya Biologiya I Aviakomicheskaya Meditsnia (Space Biology and Aerospace Medicine) (Moscow) |
| KPL | Kalamazoo Public Library |
| KPL | Keene Public Library |
| KPL | Kenosha Public Library |
| KPL | Ketchikan Public Library |
| KPL | Kinesis Producer Library |
| KPL | Kirkwood Public Library |
| KPL | Kitchener Public Library |
| KPPL | Kaibab Paiute Public Library |