What does .C stand for?

What does .C mean?

C	Cilt International » Turkish
C	Cindy Miscellaneous » Names and Nicknames
C	Circle Academic & Science » Mathematics
C	Circular Community » Media
C	circumference Miscellaneous » Unit Measures
C	Cited Community » Media
C	Citigroup Business » NYSE Symbols
C	Citizen Governmental » US Government
C	Citizens Community
C	Citrus Miscellaneous » Food
C	City Community
C	Civilization Community » Media
C	Clarification Community » Media
C	Class Academic & Science » Universities
C	Classic Community » Media
C	Classification Business » General
C	Cleanse Medical » Laboratory
C	Clear Business » Products
C	Cleveland Regional » States
C	Cleverness factor Community » Sports
C	Click Computing » General
C	Climbing Academic & Science » Botany
C	Clinical Medical » Hospitals
C	Clock Governmental » Military
C	Cloud Academic & Science » Meteorology