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In telecommunications and computing, bit rate (sometimes written bitrate or as a variable r) is the number of bits that are conveyed or processed per unit of time. the bit rate is quantified using the bits per second unit (symbol: "bit/s"), often in conjunction with an si prefix such as "kilo" (1 kbit/s = 1000 bit/s), "mega" (1 mbit/s = 1000 kbit/s), "giga" (1 gbit/s = 1000 mbit/s) or "tera" (1 tbit/s = 1000 gbit/s). the non-standard abbreviation "bps" is often used to replace the standard symbol "bit/s", so that, for example, "1 mbps" is used to mean one million bits per second. one byte per second (1 b/s) corresponds to 8 bit/s.