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ADP

Automatic Data Processing.The processing of information by means of a computer.

ADPCM

Adaptive Differential Pulse Code Modulation.A technique of translating analog sound into digital format that takes less computer memory than the regular pulse code modulation used by audio CDs.It is used on the Sony minidisk, and for CD-ROMs which have images and other data as well as sound.ADPCM takes rapid samples of sound and translates them into binary code, but instead of coding an absolute measurement at every sample point, it codes the difference between samples.

ADSL

Asymmetric Digital Subscriber Line, or Asymmetric Digital Subscriber Loop.A digital subscriber line (DSL) technology in which the transmission of data from server to client is much faster than the transmission from client to server.

Whereas with HDSL (High-Speed Digital Subscriber Line), transmission is 784 kilobytes per second in both directions, with ADSL, the rate from client to server is 640 kilobytes per second and from server to client can be up to 6 megabits per second.This kind of connection is useful with applications such as interactive TV and Video on Demand, because the data the server sends is much more than the data sent by the client.

ADSL uses bandwidth that is not used by voice; therefore voice and data can be transmitted at the same time.