H. = Hospital
H.A.I = Hospital Acquired Infection
H.A.N.D = Have A Nice Day
H&C = Hot & Cold
H.C.W = Hot & Cold Water
H&F = Husband & Father
H.M = Head Master / Mistress
H&K = Hug and Kiss
H&T = Hardened & Tempered
H/T = Half Time
H-T = High Tension
H.T.H.Y = Hope This Helps You
[H.T.H.Y] = Hope To Help You