A [?] is a device or machine for making calculations or controlling operations that are expressible in numerical or logical terms. Computers are made from [?] that perform simple well-defined functions. The complex interactions of these components endow computers with the ability to [?] information. If correctly [?] (usually by programming) a computer can be made to represent some aspect of a problem or part of a system. If a computer configured in this way is given appropriate [?] data, then it can automatically solve the problem or predict the behavior of the system. The discipline which studies the theory, design, and application of computers is called [?].