What does N.D. stand for?

What does N.D. mean?

ND	Narrow Design Business » General
ND	Nanda Devi Academic & Science » Geology
ND	Non Deployed Governmental » Military
ND	Not Detonate Governmental » Military
ND	Nice Doctor Miscellaneous » Unclassified
ND	No Diggity Internet » Chat
ND	No Dolby Academic & Science » Electronics
ND	Needs Direction Community » Educational
ND	Native Defect Academic & Science » Electronics
ND	Narrow Door Academic & Science » Architecture
ND	Nam Dong Miscellaneous » Unclassified
ND	Non-Divisible Academic & Science » Mathematics
ND	Non Diffractive Miscellaneous » Unclassified
ND	Non- Distended Medical » Physiology
ND	Now Dammit Miscellaneous » Unclassified
ND	Near Distant Miscellaneous » Unclassified
ND	Non-Duplex Computing » Telecom
ND	Not Decieved Community » Law
ND	Non-Dithering Computing » Software
ND	Node Duplication Computing » Networking
ND	No Davie Miscellaneous » Funnies
ND	No Delay Community » Sports
ND	Non-sharable Device Computing » Networking
ND	Na Dravasi Miscellaneous » Unclassified
ND	Newman Decor Miscellaneous » Unclassified