Diference between internet extentions

.Gov

It's a internet termination. This termination is derived from government.
Although it's used in the government some entities doesn't are allowed to end their pages in gov in the US.

.Edu

it's derived from education. It's an internet termination used for schools.

.Org

It's derived from organization. It's an internet name system.
You have to register it the public interest registery, the membership costs 6.56 dollars about(70.0 quetzales).

.Com
 it's commonly used for comercial purposes


Liability of the pages from 0 to 10

.Gov:10
.Com:5
.Edu:9
.Org:8