Z-hour

H-hour (H hour)

hour-to-hour (administrative) plan

A-hour

F-hour

hour angle

kilometers per hour (kph)

L-hour

miles per hour (mph)

P-hour

at the rate of x miles an hour

Y-hour

standard cubic feet per hour

fuel consumption per hour

A hour

zero hour

combat flying hour

milliamp hour (mAh)

P hour

parachute hour

S hour