3G Third-generation mobile communications technology. Technology provides increased bandwidth, up to 128 Kbps in a moving automobile, up to 384 Kbps when a device is moving at less than walking speed, and up to 2 Mbps in stationary locations. Subject of a multibillion dollar radio spectrum auction at the dawn of the 21st century.

AAC (Advance Audio Coding) Audio coding system for MPEG-2 and MPEG-4 signals that provides up to 48 channels of audio. Frequently used at 192 kbps for 5.1 surround sound.

ADSL (Asymmetric Digital Subscriber Line) Technology that enables a standard telephone line to carry high-speed data in addition to normal voice telephony. Operates by using very high frequencies to carry data; requires DSL modem devices ...

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