Two i/c (Second in command)

заступник командира (`After dark, Alec, Tony, Graham and I gathered in the main ops room for a final pep-talk from the Two i/c.` - Spence, Cameron. Sabre Squadron, p. 64)

two-seat / two seat

second in command (2i/c , 2IC)

second-in-command

bi-strategic command (Bi-SC) (of the two Strategic Commands )

meters per second (m/s)

second lieutenant

second order effect

floating-point operation per second (FLOP)

captain second rank

fuel flow (kilogram/second)

centimeter-gram-second (CGS)

meter-kilogram-second-ampere system (MKSA)

meters per second (MPS)

second cause

second mean chord

additional second lieutenant

second-trip echo

second wave attack theory

second classman

second commander

second for service

second echelon maintenance

second element

second John

second level rater

second line

second line of defence

second strike force

second theater

second-line aircraft

second-mission aircraft

second-strike strategy