What does OG stand for?

What does OG mean?

OG	Original Gravity Academic & Science » Astronomy
OG	Organic Gardening Academic & Science » Botany
OG	Old Gold Miscellaneous » Colors
OG	Oracle Graphics Computing » Databases
OG	Operational Guideline(s) Governmental » Environmental
OG	Old Gorgeous Community » Famous
OG	Outgoing Governmental » FBI Files
OG	Oriental Grill Business » Firms
OG	Ole Grey Miscellaneous » Food
OG	Orange Gatorade Miscellaneous » Food
OG	Organically Grown Miscellaneous » Food
OG	Operating Grant Business » General
OG	Online Gaming Miscellaneous » Hobbies
OG	Original Miscellaneous » Hobbies
OG	Original German Regional » Language Codes (2 Letters)
OG	Optimal Guess Academic & Science » Mathematics
OG	Observational Game Academic & Science » Mathematics
OG	Official Gazette Community » Media
OG	original gum Miscellaneous
OG	Oldies Guru Community » Music
OG	Original Guild Community » Music
OG	Zero Gravity Governmental » NASA
OG	Oxygen Gage Governmental » NASA
OG	Outer Gimbal (Roll) Governmental » NASA
OG	The Ornithology Group Community » Non-Profit Organizations