I will explain it to you in this post.
The significates of these letters are:
WWW stands for World Wide Web
COM stands for Commercial
GOB/V stands for, obviously, Goverment (gobierno)
ESC/SCH stands for School (escuela)
EDU stands for Education
Ar/Br/Us/Uk stands for Argentina/Brasil/United States/United Kingdom
More doubts? Comment please, you'll see how fast the answer will come to you in com, a blog site in which its useful to get up from bed up to the computer.
This has been another post from Marcos, the author of the page.
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