T - technical definition
- Tera. From the Greek teras, meaning monster, translates to trillion.
- In terms of the electromagnetic spectrum, THz (terahertz) is a trillion (10 12 ) hertz, which is in the range of infrared and visible light. Infrared light has application in fiber optic and free space optics (FSO) transmission systems. A Tbps is a trillion (10 12 ) bits per second. In transmission systems, therefore, a trillion is exactly 1,000,000,000,000 since the measurement is based on a base 10, or decimal, number system.
- In computing and storage systems, a TB (terabyte) is actually 1,099,511,627,776 (2 40 ) bytes, as the measurement of internal computer memory is based on a base 2, or binary, number system. The term TB comes from the fact that 1,099,511,627,776 is nominally, or approximately, 1,000,000,000,000. See also byte, electromagnetic spectrum, and hertz.
- T interface or Reference Point T in ISDN. See Reference Point T.
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