digital computer, any of a class of devices capable of solving problems by processing information in discrete form. It operates on data, including magnitudes, letters, and symbols, that are expressed in binary code—i.e., using only the two digits 0 and 1.
A digital system, such as a tablet or desktop computer, processes the data. It then produces outputs that are communicated using an output device. Input devices can be manual or automatic. Data such as text, images, sound and numbers are input into a digital system using a range of digital devices.
Digital data, in information theory and information systems, is information represented as a string of discrete symbols each of which can take on one of only a finite number of values from some alphabet, such as letters or digits.
|Definition: “Digital data jumps from one value to the next in a step by step sequence .”|
|#||All digital devices use digital data. Examples of digital devices include: Computers/Laptops/IPads Mobile Phone MP3 Player Digital Camera|
Processing device examples
Central processing unit (CPU) Graphics processing unit (GPU) Motherboard. Network card.
The processor, more formally known as the central processing unit (CPU), has the electronic circuitry that manipulates input data into the information people want. The central processing unit executes computer instructions that are specified in the program.
Digital data can be used to store very complex information. Music, movies, and games can also be stored as what are ultimately sequences of 0’s and 1’s being interpreted by a computer.
Digital signals are a more reliable form of transmitting information because an error in the amplitude or frequency value would have to be very large in order to cause a jump to a different value. Signals are composed of infinite possible values. … They also can be used to store information and data.
In this lecture, the various formats of digital data (structured, semi-structured and unstructured data), data storage mechanism, data access methods, management of data, the process of extracting desired information from data, challenges posed by various formats of data, etc. will be explained.
|Unit 2.1||The link between data, information and knowledge|
|Unit 2.6||Social implications|
Digital data is data that represents other forms of data using specific machine language systems that can be interpreted by various technologies. … One of the biggest strengths of digital data is that all sorts of very complex analog input can be represented with the binary system.
A digital device processes electronic signals that represent either a one (“on”) or a zero (“off”). The on state is represented by the presence of an electronic signal; the off state is represented by the absence of an electronic signal.
A digital device is a piece of physical equipment that uses digital data, such as by sending, receiving, storing or processing it.
A network is what allows digital devices to interconnect and transmit data. A computer network or data network is a telecommunications network which allows computers to exchange data .
The main types of data that can be input into a computer and processed are numeric, text, dates, graphics and sound.
Everyone is familiar with the term “word processing,” but computers were really developed for “data processing”—the organization and manipulation of large amounts of numeric data, or in computer jargon, “number crunching.” Some examples of data processing are calculation of satellite orbits, weather forecasting, …
The definition of a process is the actions happening while something is happening or being done. An example of process is the steps taken by someone to clean a kitchen. An example of process is a collection of action items to be decided on by government committees.
There are three main data processing methods – manual, mechanical and electronic.
GIGO (garbage in, garbage out) is a concept common to computer science and mathematics: the quality of output is determined by the quality of the input. … A variation on the term, “garbage in, gospel out,” refers to a tendency to put unwarranted faith in the accuracy of computer-generated data.
Answer: Process data is called information. The data that is processed is known as information. … There is a distinction between information and data in the context that information is the end result of the data being processed.
A string is generally considered a data type and is often implemented as an array data structure of bytes (or words) that stores a sequence of elements, typically characters, using some character encoding.
The BLOB data type stores any kind of binary data in random-access chunks, called sbspaces. Binary data typically consists of saved spreadsheets, program-load modules, digitized voice patterns, and so on. The database server performs no interpretation of the contents of a BLOB column.
Most researchers keep hand-written laboratory notebooks, journals and other materials which are not created or stored on a computer at all.
Digital computing involves using electronics to represent the 1’s and 0’s of binary, the base 2 counting system of all digital data. These 1’s and 0’s can take 6 different “physical” forms as they travel between and through the various hardware components of a digital computing system.