.com
Company
For Example - https://www.youtube.com
.gov
Government
For Example - https://www.usa.gov
.net
Network
For Example - https://www.asp.net
.sch
School
For Example - http://adnoc.sch.ae
.ac
Academy
For Example - https://www.ox.ac.uk
.co
Co-Operation
For Example - https://www.go.co
.edu
Education
For Example - https://harvard.edu
.org
Organisation
For Example - https://en.wikipedia.org