- ACNS stands for Anglican Communion News Service
- ACNS stands for Applied Cryptography and Network Security
- ACNS stands for Application and Content Networking System (Cisco)
- ACNS stands for American Conference on Neutron Scattering
- ACNS stands for Adult Clinical Nurse Specialist
- ACNS stands for Assistant Chief of Naval Staff (Australia and UK)
- ACNS stands for Academic Computing and Networking Services
- ACNS stands for American Clinical Neurophysiology Society
- ACNS stands for AIDS Coalition of Nova Scotia (Canada)
- ACNS stands for Automated Copyright Notice System
- ACNS stands for Advisory Committee on Nuclear Safety
- ACNS stands for Aircraft Carrier Navigation System
ACNS