Definition of keyboard for English Language Learners. : 1  a row or set of keys that are pushed to play a musical instrument (such as a piano) : 2  a musical instrument that is played by means of a keyboard like that of a piano and that produces sounds electronically. : 3  the set of keys that are used for a computer or typewriter.
Classless Inter-Domain Routing (CIDR, pronunciation: /ËsaÉªdÉr/ or /ËsÉªdÉr/) is a method for allocating IP addresses and IP routing. The Internet Engineering Task Force introduced CIDR in 1993 to replace the previous addressing architecture of classful network design in the Internet.
BSR. 1  A Sweedish company that produces engine tuning kits for a wide variety of cars, including Saab, Volvo, Seat, Fiat, VW, BMW, Opel, Mercedes, and Audi. BSR's Protable Program Carrier (PPC) plugs into the car's On-Board Diagnosic (OBD-II) Port (where the mechanic scans engine codes) and re-tunes the engine computer. The engine computer can also be de-tuned back to factory settings. The PPC is married to the car that it first tunes (sorry, you can't pass it around).