Map of terminals, boarding areas, and runways at San Francisco International Airport (KSFO/SFO). Simplified vector shapes extracted from FAA source PDF.
Runway designations are shown at their respective thresholds. Since the runways are reversible, aircraft traveling on a WNW heading would be (for example) on 28R, but aircraft traveling in the opposite direction (ESE) on the same runway would be on 10L instead.

T1 = Terminal 1, with boarding areas B and C
T2 = Terminal 2, with boarding area D
T3 = Terminal 3, with boarding areas E and F
IT = International Terminal, with boarding areas A and G
PDF source file from FAA
Federal Aviation Administration