HTOL can be an abbreviation for:
High temperature operating life, a method of estimating the operating life of a product Horizontal take-off and landing, as opposed to Vertical take-off and landing STOL, Short take-off and landing CTOL, Conventional take-off and landing STOBAR, Short take-off but arrested recovery CATOBAR, Catapult-assisted take-off but arrested recovery
See also HOTOL, a British spaceplane design of the 1980s