TTL may refer to:

Photography

Through-the-lens metering In photography, through-the-lens metering (TTL metering) refers to a feature of cameras whereby the intensity of light reflected from the scene is measured through the lens; as opposed to using a separate metering window or external hand-held light ...

, a camera feature * Zenit TTL, an SLR film camera named for its TTL metering capability

Technology

Time to live Time to live (TTL) or hop limit is a mechanism which limits the lifespan or lifetime of data in a computer or network. TTL may be implemented as a counter or timestamp attached to or embedded in the data. Once the prescribed event count or times ...

, a computer data lifespan-limiting mechanism *

Transistor–transistor logic Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors. Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"), as o ...

, a family of integrated-circuit digital logic **

Differential TTL Differential TTL is a type of binary electrical signaling based on the transistor-transistor logic (TTL) concept. Standards implementing differential TTL include RS-422. It enables electronic systems to be relatively immune to noise. Normal TTL ...

, a serial signaling standard based on TTL *

Turtle (syntax) In computing, Terse RDF Triple Language (Turtle) is a syntax and file format for expressing data in the Resource Description Framework (RDF) data model. Turtle syntax is similar to that of SPARQL, an RDF query language. It is a common data for ...

, a computer data format used in semantic web technologies

Other uses

* Taiwan Tobacco and Liquor, a state-owned manufacturer * "

TTL (Time to Love) ''Absolute First Album'' is the first studio album and debut Korean release by South Korean girl group T-ara. It was released on November 27, 2009, through Core Contents Media. T-ara sought to showcase "two different charms" through ''Absolute Fi ...

", a single by South Korean girl group T-ara and boy band Supernova {{Disambiguation