modern computers

The first devices that resemble modern computers date to the mid-20th century (around 1940 - 1945), although the concept of computer and various machines similar to computers existed before. The small electronic computers were the size of a large room, consume more energy than several hundred modern personal computers. [1] Modern computers are based on tiny integrated circuits and millions to billions of times more likely to occupation while a fraction of space. [2] Today, simple computers May be small enough to fit in a wristwatch and be powered by a battery standby. Personal computers, in various forms, are icons of the information age and are what most people think of as "a computer", but the most common form of computers in use today east-board computer. Embedded computers are small, simple devices that are used for controlling other devices - for example, May they be found in machines from fighter jets of industrial robots, digital cameras, and toys for children. 

The ability to store and execute lists of instructions called the curricula of computers makes it extremely versatile and distinguishes them from calculators. The Church-Turing thesis is a mathematical statement of this versatility: any computer with a certain minimum capacity is, in principle, be able to perform the same tasks as any other computer can execute. Therefore, computers with the capacity and complexity from that of a personal digital assistant to a supercomputer are all capable of performing the same tasks of calculation given enough time and storage capacity.