Manchester Automatic Digital Machine - ορισμός. Τι είναι το Manchester Automatic Digital Machine
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Τι (ποιος) είναι Manchester Automatic Digital Machine - ορισμός

FIRST ELECTRONIC STORED-PROGRAM COMPUTER
Small-Scale Experimental Machine; Small Scale Experimental Machine; Manchester Small Scale Experimental Machine; Baby (computer); Manchester SSEM; Manchester small-scale experimental machine; Manchester Small-Scale Experimental Machine; Manchester Baby Mark 1; The Manchester Small Scale Experimental Machine
  • Architectural schematic showing how the four [[cathode-ray tube]]s (shown in green) were deployed
  • Output CRT
  • A plaque in honour of Williams and Kilburn at the University of Manchester
  • Artistic representation of a [[Turing machine]]
  • The output CRT is immediately above the input device, flanked by the monitor and control electronics.

Manchester Mark 1         
  • Section of punched tape showing how one 40-bit word was encoded as eight 5-bit characters
  • Functional schematic showing the Williams tubes in green. Tube C holds the current instruction and its address; A is the accumulator; M is used to hold the multiplicand and the multiplier for a multiply operation; and B contains the index registers, used to modify instructions.
ENGLISH STORED-PROGRAM COMPUTER, 1949
Machester Mark I; Manchester Mark I; Mark One Baby
The Manchester Mark 1 was one of the earliest stored-program computers, developed at the Victoria University of Manchester, England from the Manchester Baby (operational in June 1948). Work began in August 1948, and the first version was operational by April 1949; a program written to search for Mersenne primes ran error-free for nine hours on the night of 16/17 June 1949.
AUTODIN         
LEGACY DATA COMMUNICATIONS SERVICE IN THE UNITED STATES DEPARTMENT OF DEFENSE
AUTODIN; Autodin; Automatic digital network
AUTOmatic DIgital Network (Reference: DMS, DISA)
Automatic Digital Network         
LEGACY DATA COMMUNICATIONS SERVICE IN THE UNITED STATES DEPARTMENT OF DEFENSE
AUTODIN; Autodin; Automatic digital network
The Automatic Digital Network System, known as AUTODIN, is a legacy data communications service in the United States Department of Defense. AUTODIN originally consisted of numerous AUTODIN Switching Centers (ASCs) located in the United States and in countries such as England and Japan.

Βικιπαίδεια

Manchester Baby

The Manchester Baby, also called the Small-Scale Experimental Machine (SSEM), was the first electronic stored-program computer. It was built at the University of Manchester by Frederic C. Williams, Tom Kilburn, and Geoff Tootill, and ran its first program on 21 June 1948.

The Baby was not intended to be a practical computing engine, but was instead designed as a testbed for the Williams tube, the first truly random-access memory. Described as "small and primitive" 50 years after its creation, it was the first working machine to contain all the elements essential to a modern electronic digital computer. As soon as the Baby had demonstrated the feasibility of its design, a project was initiated at the university to develop it into a full scale operational machine, the Manchester Mark 1. The Mark 1 in turn quickly became the prototype for the Ferranti Mark 1, the world's first commercially available general-purpose computer.

The Baby had a 32-bit word length and a memory of 32 words (1 kilobit, 1,024 bits). As it was designed to be the simplest possible stored-program computer, the only arithmetic operations implemented in hardware were subtraction and negation; other arithmetic operations were implemented in software. The first of three programs written for the machine calculated the highest proper divisor of 218 (262,144), by testing every integer from 218 downwards. This algorithm would take a long time to execute—and so prove the computer's reliability, as division was implemented by repeated subtraction of the divisor. The program consisted of 17 instructions and ran for about 52 minutes before reaching the correct answer of 131,072, after the Baby had performed about 3.5 million operations (for an effective CPU speed of about 1100 instructions per second).