Time to live, a mechanism that limits the lifespan of data in a computer or network
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Through-the-lens metering, a camera feature that permits light metering through the taking lens itself, rather than via a separate window
Early System 1 boards and cartridge boards used large numbers of 7400 series TTL chips.
Intel's Ted Hoff was assigned to studying Busicom's design, and came up with a much more elegant, 4 ICs architecture centered on what was to become the 4004 microprocessor surrounded by a mixture of 3 different ICs containing ROM, shift registers, input/output ports and RAM—Intel's first product (1969) was the 3101 Schottky TTL bipolar 64-bit SRAM.
The display driver will typically accept commands and data using an industry-standard general-purpose serial or parallel interface, such as TTL, CMOS, RS232, SPI, voltage, current, timing and demultiplexing to make the display show the desired text or image.
Apple II's hi-res display pages (Hi-Res 1: 280 × 160 and Hi-Res 2: 280 × 192) were implemented by Steve Wozniak using two TTL chips.
For small-scale logic, designers now use prefabricated logic gates from families of devices such as the TTL 7400 series by Texas Instruments and the CMOS 4000 series by RCA, and their more recent descendants.
However, according to Shima himself, the logic was first tested on breadboards using TTL chips, before being manually translated into MOS transistor equivalents.
It is the first camera with built-in exposure meter, capable of measuring the light through the lens, the so called Through-the-lens metering (TTL).
The tick-mark here represents the omitted subfamily designator – most commonly HC (high-speed CMOS), but can also be blank (original TTL), C (CMOS), LS (low-power Schottky), and many others.
TTL was established in January 2001, and is owned by Zee Telefilms, who acquired a 95% stake from Bukhatir Investments in 2010 for 114 million USD.
In theory, under IPv4, time to live is measured in seconds, although every host that passes the datagram must reduce the TTL by at least one unit.
Lancaster, D. TTL Cookbook. Indianapolis: Howard W. Sams and Co. 1975.