Stands for "Kilobits Per Second." Try not to confuse this with Kilobytes per second (which is 8 times more data per second). This term is most often used in describing modem speeds. For example, two common modem speeds are 33.6 Kbps and 56 Kbps.
KBPS
Meaning of KBPS in English
English glossary of computer and Internet terms. Английский глоссарий компьютерных и Интернет терминов. 2012