What does S.D stand for?

What does S.D mean?

SD	Secure Data Computing » Security
SD	Senate District Governmental » State & Local
SD	Super Deformed Academic & Science » Physics
SD	Same Domain Computing » Networking
SD	Standard Definition Academic & Science » Electronics
SD	Strongly Disagree Community » Educational
SD	Super Drive Governmental » Transportation
SD	Sound Designer Business » Positions
SD	Super Deformed Business » Products
SD	Structured Design Business » General
SD	Structured Design Governmental » NASA
SD	Structured Design Academic & Science » Chemistry
SD	Structured Design Governmental » Military
SD	Structured Design Governmental » US Government
SD	Structured Design Academic & Science » Electronics
SD	Structured Design Governmental » Transportation
SD	SubDirección International » Spanish
SD	Submitted Data Computing » General
SD	Special Delivery Miscellaneous » USPS
SD	Synchronous Dynamic Academic & Science » Electronics
SD	Spool Directory Computing » General
SD	Source to Destination Governmental » Transportation
SD	Super Duty Business » Products
SD	Sun Dome Community » Sports
SD	Standard Digital Business » Products