| NICS | NAS (National Airspace System) Interfacility Communications System 
| Others |
| NICS | National Immunisation Coverage Survey
| Others |
| NICS | National Instant Check System
| Others |
| NICS | National Instant Criminal Background Check System
| Others |
| NICS | National Instant Criminal Search
| Others |
| NICS | National Institute for Chemical Studies
| Others |
| NICS | National Institute for Computational Sciences
| Others |
| NICS | National Institute of Clinical Studies
| Others |
| NICS | National Institute of Crop Science
| Others |
| NICS | National Intensive Care Surveillance
| Others |
| NICS | NATO Integrated Communications System
| Others |
| NICS | Nature's International Certification Services
| Others |
| NICS | Network Initiative for Conservation Science
| Others |
| NICS | Network Integrated Computing Solution
| Others |
| NICS | Network Integration Consulting Services
| Others |
| NICs | Network Interface Cards
| Others |
| NICS | Network of International Christian Schools
| Others |
| NICS | Neuro-Immuno-Cutaneous System
| Others |
| NICS | Neurological Impulse Combat System
| Others |
| NICS | Newborn Intensive Care Specialist
| Others |
| NICS | Newborn Intensive Care Specialists
| Others |
| NICS | Newhouse Internet and Computing Services
| Others |
| NICS | Newly Industrializing Countries States
| Others |
| NICS | Nice Institute for Competitive Studies
| Others |
| NICS | Nissan Induction Control System
| Others |
| NICS | Norfolk Island Central School
| Others |
| NICS | North Idaho Christian School
| Others |
| NICS | Northern Ireland Civil Service
| Others |
| NICS | Northwest Intertribal Court System
| Others |
| NICS | Novell Internet Caching System
| Others |
| NICS | Nucleus Independent Chemical Shift
| Others |
| NICS | Nucleus independent chemical shifts
| Others |
| NICS | Nucleus-Independent Chemical Shift
| Others |