| Abbreviation | Definition |
|---|---|
| ACK | Artful Card Kit |
| ACK | Austin Canoe and Kayak |
| ACKD | Academy of Classical Karate Do?? |
| ACKD | Acworth Choi Kwang Do |
| ACKK | All Cool Kids Kongregate |
| ACKL | Acceleration Centre Kuala Lumpur |
| ACKM | Advancing Christ's Kingdom Ministries |
| ACKM | Analisis Cemaran Kimia Makanan |
| ACKM | Asociacion Cantabra de Kayak de Mar |
| ACKN | Acknowledgement |
| ACKN | Arbeitsgemeinschaft Christlicher Kirchen in Niedersachsen |
| ACKNOWLEDGE | acknowledged |
| ACKNOWLEDGE | Acknowledgement |
| ACKNOWLEDGE | Acknowledging |
| ACL | Absolutely Continuous On Lines |
| ACL | Access Central Limit |
| ACL | Access Control Layer |
| ACL | access control levels |
| ACL | Access Control Lists |
| ACL | Administration for Community Living |