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Computer History
This category includes questions and answers about the history of the computer. Ask questions about the first computer and major developments in computing.
5,564 Questions
How does a von Neumann Machine work?
A von Neumann machine is a computer built around (i) a control unit, an arithmetic and logic unit, a memory, and input and output facilities; (ii) a way of storing programs in memory; and (iii) a method whereby the control unit sequentially reads and carries out instructions from the program.
The person who contributed the idea of the stored program concept was?
Unknown. It was developed in the ENIAC project in WW2 but nobody recorded who first came up with it. ENIAC did not use it.
When did the first computer run a program from memory?
The Manchester Baby was the first computer to run a program from memory, it ran its first program on June 21, 1948. The program was stored in a 32 word CRT based DRAM and consisted of 17 instructions; it ran for 52 minutes before reaching the correct answer of 131,072, after performing 3.5 million operations (for an effective CPU speed of 1.1 kIPS).
The modified ENIAC was the second computer to run a program from memory, it ran its first program as a stored-program computer on September 16, 1948. The program was stored in the 100 word Function Table ROM switches as 2 digit instructions (allowing storage for up to 500 instructions).
Why was 650 MB size chosen for CD ROM?
it was just enough to hold one of beethoven's symphanies but sorry I don't know which one it was.
Where can i see a log of what I've been doing on my PC in windows 7?
Can you try again and post in some sensible English?
When and why was the eniac unplugged?
ENIAC was unplugged as it runs on technology that makes the average 10-year-old Linux box seem like a Concorde compared to a turtle. It did calculations at a rate of under 5000 additions a second. Nowadays new computers (running the Intel Core i7 Extreme Edition i980EE processor) can do well over 100,000 MILLION calculations per second, even that 10-year old Linux box can do about 3,561 MILLION calculations per second (running AMD Athlon processor).
BTW: for comparison; the average person working with pen and paper can do about 0.0119 calculations per second
Sourced from http://en.wikipedia.org/wiki/Instructions_per_second
Alexander Graham Bell
P.S.:you spelled cell phones wrong;)
What does the Z mean as in z3?
The Germans are very straight people and the technik is always more important than imagination or design. Except Z3!
What makes the Z3 an unique BMW is that the father (designer) was a Japanese, the base chassis is from E36 (a very reliable, strong and popular chassis) and the production was done for the first time in USA in Spartanburg.
Z3 will always be the first reliable and popular roadster of BMW, realized in a very cosmopolite world , the first roadster after the expensive roadster 507 (1956), keeping his shapes in a excellent retro style.
It will always be a collectible and a real roadster for normal peoples. Unisex and affordable.
The Z3 meaning is interesting and disarming simple: Z comes from "Zukunft" , in German means : future. And 3 is the version of the vehicle.
It is also one of the cars with the shortest Brand/Type name in the world: only 5 letters! try to find how many you will find!
Where can you buy punch card machine in Singapore?
You can buy from datamine IT Services.
They sale cheap and reliable punch card machine. Also sometime have promotion price.
you can visit their office also.
address:
190 middle road fortune center #19-05
tel: 6264 8726 or 6826 1053
5 Who helped Babbage in his work?
Charles Babbage received significant help from several individuals in his work on the analytical engine, most notably Ada Lovelace. Lovelace is often recognized for her contributions, as she wrote extensive notes on the engine and is considered the first computer programmer for her algorithms designed for it. Additionally, Babbage collaborated with mathematician John Herschel and engineer Joseph Clement, who provided technical expertise and support for his ambitious projects.
I think you're referring to ads for products marketed as "The next generation in computer technology", yes? It's just marketing jargon for "here's something new which does something existing technology doesn't"... there aren't established 'computer generations', per say, unless you're looking at, say, the Windows operating systems, where Windows 7 will follow Vista, which followed XP, which followed ME...
Laptops were never discovered, rather they were invented and developed. The pioneer of modern laptop is Toshiba Corporation, way back in 1981.
It might have been. Y2K Stands for year two thousand. The old computers went from 1997 to 98 to 99, and 00 is an invalid date. Basically all the computers in the world would have shut down, and yes, that includes the bank computers. It would have been a major problem because basically everyone would be bankrupt at the stroke of midnight on January 1st 2000. Scary, no?
