noun: (computing) Initialism of Supplementary Special-purpose Plane (plane 14 of Unicode, containing 65,536 code points—U+E0000 through U+EFFFF—intended for encoding certain types of special-purpose characters but currently almost entirely unused).
noun: (law enforcement) Abbreviation of senior superintendent. (a police rank)
noun: (aerospace) Abbreviation of space solar power or space-based solar power.
noun: (hydroacoustics) Initialism of sound speed profile.
