IS
IS is used for the Icelandic nation and language, for information or integrated systems in tech and academia, and also appears as an abbreviation for the political group Izquierda Socialista.
Medical
Miscellaneous
Community
Governmental
Internal Stabilization
International Security
Intersil
Independent Sector
Internal Security
Installation Support
Interconnecting Station
Information Superiority
InterSwitch
Ingredients Statement
Intermediate State (in the Theory of Change)
International
Academic & Science
Information System
Integrated Systems
Individuals Studying
Information Science
Intuitive Studies
Integrated Sciences
Image Stablizer
Interface Specification
Regional
Computing
Modula-3 Intermediate assembly file
Intermediate System
International Standard
Integrated System
Internet Server
Insta
Information Separator
Infrastructure Services