spt. Seaport.
sq. Square.
sq., sequens=The following.
Sr. Senior; Sir.
S.R.I., Sacrum Romanum Imperium=Holy Roman Empire.
S.R.S., Societatis Regiæ Socius=Fellow of the Royal Society.
S.S. Sabbath School.
Ss. Saints.
s.s. Steamship; Screw steamer.
S.S.C. Solicitor before the Supreme Court (Scotland); Societas Sancti Crucis=Society of the Holy Cross.