What does SJB stand for?

San Joaquin - Bolivia - Airport symbol (AD)

Semi-Jetborne (SAUS)

Sisters of St. John Bosco (Taylor, TX) (TOCD)

Society of Jewish Bibliophiles (EA)

Society of Journeymen Brushmakers - A union - British

St. Joseph Belt Railway Co. - AAR code

Westfield, MA - Location identifier - FAA (FAAL)