For SFO airport. In san fransisco what does the O stand for?

The International Air Transport Association's (IATA) Location Identifier is a unique 3-letter code that is used in aviation and partly in logistics to recognize mainly locations of airports throughout the world. SFO is the airport code for San Francisco International airport and the letter “O” doesn’t stand for anything other than part of the word "San Francisco".

San Francisco International Airport (SFO) is one of the 30 busiest airports in the world and was the first major U.S. airport to accomplish 100 percent completely automated and integrated baggage screening. At SFO they have banking services, currency exchange offices and wireless Internet access. They also offer DVD player rentals with the newest movies to keep passengers entertained along the way.

For full, current coverage of the Asiana Airlines flight that crash landed in San Francisco recently, go to NBC's Flight 212 Crash Landing page.