Лекция: Early computer characteristics
Defining characteristics of some early digital computers of the 1940s (In the history of computing hardware) | |||||
Name | First operational | Numeral system | Computing mechanism | Programming | Turing complete |
Zuse Z3 (Germany) | May 1941 | Binary floating point | Electro-mechanical | Program-controlled by punched 35 mm film stock (but no conditional branch) | In theory (1998) |
Atanasoff–Berry Computer (US) | Binary | Electronic | Not programmable—single purpose | No | |
Colossus Mark 1 (UK) | February 1944 | Binary | Electronic | Program-controlled by patch cables and switches | No |
Harvard Mark I – IBM ASCC (US) | May 1944 | Decimal | Electro-mechanical | Program-controlled by 24-channel punched paper tape (but no conditional branch) | Debatable |
Colossus Mark 2 (UK) | June 1944 | Binary | Electronic | Program-controlled by patch cables and switches | In theory (2011) |
Zuse Z4 (Germany) | March 1945 | Binary floating point | Electro-mechanical | Program-controlled by punched 35 mm film stock | Yes |
ENIAC (US) | July 1946 | Decimal | Electronic | Program-controlled by patch cables and switches | Yes |
Manchester Small-Scale Experimental Machine (Baby) (UK) | June 1948 | Binary | Electronic | Stored-program in Williams cathode ray tube memory | Yes |
Modified ENIAC (US) | September 1948 | Decimal | Electronic | Read-only stored programming mechanism using the Function Tables as program ROM | Yes |
EDSAC (UK) | May 1949 | Binary | Electronic | Stored-program in mercury delay line memory | Yes |
Manchester Mark 1 (UK) | October 1949 | Binary | Electronic | Stored-program in Williams cathode ray tube memory and magnetic drum memory | Yes |
CSIRAC (Australia) | November 1949 | Binary | Electronic | Stored-program in mercury delay line memory | Yes |
еще рефераты
Еще работы по информатике
Реферат по информатике
Earliest True Hardware
29 Декабря 2015
Реферат по информатике
E.x. 3.3.7. Прочитайте текст.
29 Декабря 2015
Реферат по информатике
E.x. 3.2.30. Переведите предложенный абзац текста на русский язык.
29 Декабря 2015
Реферат по информатике
E.x. 3.2.24. Вставьте пропущенные слова в предложения.
29 Декабря 2015