This document discusses multiple access techniques for wireless communication. It describes three main techniques: frequency division multiple access (FDMA), time division multiple access (TDMA), and code division multiple access (CDMA). FDMA allocates different frequency bands to different users. TDMA divides the available bandwidth into time slots and allocates slots to users. CDMA spreads user signals using unique codes and allows simultaneous transmission. Common cellular systems that use these techniques include AMPS (FDMA), GSM (TDMA), and IS-95 (CDMA).