What does .C stand for?

What does .C mean?

C	Color Miscellaneous » Colors
C	Cyan Miscellaneous » Colors
C	Citizens Community
C	Community Community
C	City Community
C	Cooperate Community
C	Canterwood Community
C	Culture Community
C	Cousin Community
C	Celtic Regional » Countries
C	Centime Regional » Currencies
C	Christmas Miscellaneous » Days Abbreviations
C	Creativity Community » Educational
C	Curiosity Community » Educational
C	Composition Community » Educational
C	Complaining Community » Educational
C	Correctness Community » Educational
C	Concepts Community » Educational
C	Control Academic & Science » Electronics
C	form C (break-before-make) contacts Academic & Science » Electronics
C	Collector (transistor) Academic & Science » Electronics
C	Capacitor Academic & Science » Electronics
C	Connector Academic & Science » Electronics
C	Capacitance Academic & Science » Electronics
c	with Governmental » FDA