Proper noun
(computing) Initialism of Network Store Interface Service (a Microsoft Windows service)
(computing) Initialism of Next Steps in Signaling (an Internet Engineering Task Force working group)
(computing) Initialism of Nullsoft Scriptable Install System (a script-driven Windows installation system)
Source: en.wiktionary.orgMass registration of persons began in 2014 under the National Security Information System (NSIS) and was later institutionalised by the Registration of Persons Act (2015) that created Nira. Source: Internet