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The universal Turing machine was a type of stored-program computer capable of mimicking the operations of any Turing machine (computer model) based on the software instructions passed to it. The storage of computer programs is key to the operation of modern computers and is the connection between computer hardware and software. [ 7 ]
The first of three programs written for the machine found the highest proper divisor of 2 18 (262,144), a calculation that was known would take a long time to run—and so prove the computer's reliability—by testing every integer from 2 18 − 1 downwards, as division was implemented by repeated subtraction of the divisor.
Typically binary computers with word size up to 36 bits had one instruction per word, binary computers with 48 bits per word had two instructions per word and the CDC 60-bit machines could have two, three, or four instructions per word, depending on the instruction mix; the Burroughs B5000, B6500/B7500 and B8500 lines are notable exceptions to ...
Lists of computers cover computers, or programmable machines, by period, type, vendor and region. Early computers. List of vacuum tube computers;
The following outline is provided as an overview of and topical guide to computers: Computers – programmable machines designed to automatically carry out sequences of arithmetic or logical operations. The sequences of operations can be changed readily, allowing computers to solve more than one kind of problem.
A human computer, with microscope and calculator, 1952. It was not until the mid-20th century that the word acquired its modern definition; according to the Oxford English Dictionary, the first known use of the word computer was in a different sense, in a 1613 book called The Yong Mans Gleanings by the English writer Richard Brathwait: "I haue [] read the truest computer of Times, and the best ...
Dell Inspiron One 23 Touch, an all-in-one PC from 2012. An all-in-one computer (also called an AIO or all-in-one PC) is a type of personal computer that integrates the computer components, such as the CPU, monitor, and speakers, into a single unit. It occupies a smaller footprint than a desktop computer with a tower form factor, and also uses ...
The program, input, and output were implemented as described above for the Z1. Although conditional jumps were not available, it has been shown that Zuse's Z3 is, in principle, capable of functioning as a universal computer. [63] [64] The machine could do 3–4 additions per second, and took 3–5 seconds for a multiplication. The Z3 was ...