E-mail symbol. Computer illustration representing electronic mail (e-mail), showing the at symbol with streams of zeroes and ones (binary digits). The at symbol is used in an e-mail address, a method whereby computer users can send and receive text and images over the internet. The internet is an international network of computers which includes the World Wide Web. The binary system represents numbers and computer commands with a series of 0s and 1s. Computers use it to communicate with each other as an electric pulse can be used to represent a 1, whilst the absence of a pulse registers a 0.
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