TTL

TTL may refer to:

Photography

 * Through-the-lens metering, a camera feature
 * Zenit TTL, an SLR film camera named for its TTL metering capability

Technology

 * Time to live, a computer data lifespan-limiting mechanism
 * Transistor–transistor logic, a family of integrated-circuit digital logic
 * Differential TTL, a serial signaling standard based on TTL
 * Turtle (syntax), a computer data format used in semantic web technologies

Other uses

 * Taiwan Tobacco and Liquor, a state-owned manufacturer
 * "TTL (Time to Love)", a single by South Korean girl group T-ara and boy band Supernova