n science and technology[edit]
In computing[edit]
Network Information Service, formerly known as "Yellow Pages" (YP); a client-server directory service network protocol
Network information system, a system to manage other networks
Nippon Ichi Software, a developer and publisher of video games
Norton Internet Security, computer security software developed by Symantec Corporation
Network and Information Security, a term extensively used by European Network and Information Security Agency (ENISA)