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 lig ...

, a camera feature *

Zenit TTL Zenit (russian: Зени́т) is a Russian (and formerly Soviet) camera brand manufactured by KMZ in the town of Krasnogorsk near Moscow since 1952 and by BelOMO in Belarus since the 1970s. The Zenit trademark is associated with 35 ...

, 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 time ...

, 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 TT ...

, 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 format ...

, a computer data format used in semantic web technologies

Other uses

Taiwan Tobacco and Liquor Taiwan Tobacco and Liquor Corporation (TTL; ), is a state-owned manufacturer and distributor of cigarettes and alcohol, and also formerly (until 2002) a state-sanctioned alcohol beverage brewing and retailing monopoly, in Taiwan. Its most famo ...

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