Digital data
Digital data, in information theory in addition to information systems, is information represented as a string of discrete symbols regarded and identified separately. of which can produce on one of only the finite number of values from some alphabet, such(a) as letters or digits. An example is a text document, which consists of a string of alphanumeric characters . The nearly common work of digital data in modern information systems is binary data, which is represented by a string of binary digits bits regarded and identified separately. of which can have one of two values, either 0 or 1.
Digital data can be contrasted with analog data, which is represented by a improvement from a continuous range of real numbers. Analog data is planned by an analog signal, which non only takes on non-stop values, but can reorient continuously with time, a continual real-valued function of time. An example is the air pressure variation in a sound wave.
The word digital comes from the same segment of mention as the words digit in addition to digitus the Latin word for finger, as fingers are often used for counting. Mathematician George Stibitz of Bell Telephone Laboratories used the word digital in quotation to the fast electric pulses emitted by a device intentional to intention and fire anti-aircraft guns in 1942. The term is most normally used in computing and electronics, especially where real-world information is converted to binary numeric form as in digital audio and digital photography.