• NACS NetWare Asynchronous Communications Server
• NAK Negative AcKnowledgement
• NASI Network Asynchronous Services Interface / NetWare Asynchronous Services Interface
• NAU Network Addressable Unit
• NAUN Nearest Active Upstream Neighbor
• NBP Name Binding Protocol
• NCIC National Crime Information Computer
• NCP Network Control Program
• NCS Network Connect Services
• NCSA National Center for Supercomputing Applications
• NCSI Network Communications Services Interface
• NDIS Network Driver Interface Standard
• NEARNET New England Academic and Research NETwork
• NED NASA Extragalactic Database
• NEP Network Entry Point
• NEST Novell Embedded Systems Technology
• NetBEUI NetBIOS Extended User Interface
• NETBIOS NETwork Basic Input/Output System
• NEXT Near End Cross (X) Talk
• NFS Network File System
• NIC Network Interface Card / Network Interface Controller / Network Information Center
• NICE Network Information and Control Exchange
• NII National Information Infrastructure
• NIS Network Information Services / Names Information Socket
• NISO National Information Standards Organization
• NIST National Institute of Standards and Technology
• NLM Network Loadable Module / NetWare Loadable Module
• NLSP Network Link Services Protocol
• NMI NonMaskable Interrupt
• NMS Network Management Station
• nn no news is good news
• NNTP Net News Transport Protocol / Network News Transport Protocol
• NOC Network Operations Center
• NOS Network Operating System
• NPTN National Public Telecommunications Network / National Public Telecomputing Network
• NREN Nationals Research and Education Network
• NRZ Non-Return to Zero
• ns nanosecond
• NSF National Science Foundation
• NSIC National Storage Industry Consortium
• NSP Network Services Protocol / Native Signal Processing
• NSS Nodal Switching Station
• NSTL National Software Testing Laboratories
• NT Network Termination / Nested Task
• NTP Network Time Protocol
• NTSC National Television Standards Committee
• NVEs Network Visible Entities
• NVRAM Non-Volatile Random Access Memory