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Citation and Style Guides


The Domain Name System acts like a phone book for the Internet by translating IP addresses into user-friendly computer host names, or domain names, which are the suffixes found at the end of Web site URLs.

URL Domain Names

Domain Suffix 


Represents the word "commercial," and is the most widely used extension in the world.


Was originally intended for sites related to the Internet, but now used for a variety of sites.


Originally intended for non-commercial "organizations", but now used for a wide variety of sites.


Used for educational institutions like universities and colleges.


Used for business sites, usually small businesses.


Used for U.S. Government sites, formerly only federal government but later expanded to state and local.


Used for U.S. Military sites, including army, navy, air force, etc.


Used for registering organisations established by international treaties between or among national governments.


UC LibGuides at Union County College