title: TTL
text: # 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
  