TTL may refer to:

Look up TTL, Ttl, or ttl in Wiktionary, the free dictionary.

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

• 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

• 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

This disambiguation page lists articles associated with the title TTL.
If an internal link led you here, you may wish to change the link to point directly to the intended article.