.com-- commercial: These are the majority of websites. This domain is used by for profit companies (McDonalds, Apple, Microsoft, Nike) Organizations using this domain are typically trying to sell something.
.org-- organization: This is used by not for profit companies. (NPR, churches, charities). These typically have information, but may have an ulterior motive or a bias in the information they present.
.gov-- government: These domains are reserved for government agencies (Department of Natural resources, Library of Congress, IRS). The information found on these websites is reliable.
.edu-- education: This domain is restricted to educational institutions. (mga.edu, harvard.edu, valdosta.edu) The information here is also reliable.
