San Francisco Realtors seemingly, at times, speak a different language. We refer to the neighborhoods of SF by District and Subdistrict. For example, "a sweet 1908 SFR just listed in TAN in 5e." Interpretation: An Edwardian house is coming to market soon in Cole Valley, but is listed for early viewings off market and has been posted in Top Agent Network, an online community for the top agents in San Francisco.
The below map is a great way to familiarize yourself with the Districts and Subdistricts of San Francisco, you may just learn something new!