GSM (Global System for Mobile communication) is a digital mobile telephony system that is widely used in Europe and other parts of the world. GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephony technologies (TDMA, GSM, and CDMA)
Code division multiple access
Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication...
Engineers consider liquid salt to generate power
This molten salt nuclear reactor operated in the 1960s. Today, engineers are reviving and improving its design in the hopes of providing affordable power for the future.