What does Y stand for?

What does Y mean?

Y	You Internet » Chat
Y	Why Computing » Texting
Y	Why? Internet » Chat
Y	Ya Miscellaneous » Unclassified
Y	Years Miscellaneous » Unit Measures
Y	Yesterday Miscellaneous » Days Abbreviations
Y	Yes Miscellaneous » Unclassified
Y	Yard Miscellaneous » Unclassified
Y	YMCA Community » Educational
Y	Yelling Community » Educational
Y	Yttrium Academic & Science » Chemistry
Y	Yak Miscellaneous » Unclassified
Y	Yaw Miscellaneous » Unclassified
Y	Yohimbine Miscellaneous » Unclassified
Y	Young's Modulus of elasticity Academic & Science » Physics
Y	YACC Grammar file Computing » File Extensions
Y	Subsampled raw YUV file Bitmap graphics Computing » File Extensions
Y	Yukon Standard Time [UTC - 0900] Regional » Time Zones
Y	Alleghany Corporation of Delaware Business » NYSE Symbols
Y	Yen Miscellaneous » Unclassified
Y	Youthful Miscellaneous » Unclassified
Y	Yaw Governmental » NASA
Y	Vertical axis (plotter Y-axis) Computing » Hardware
Y	vertical axis (Y-axis) Academic & Science » Mathematics
Y	Vertical axis Academic & Science » Physics