Sunbury Downs College. Welcome to. IT Applications & Software Development 2008. 1937 war is feared. The rush is on to develop an electric computer to calculate flight trajectories for gun shells and bombs. 1937 war is feared.
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The rush is on to develop an electric computer to calculate flight trajectories for gun shells and bombs.
Why? It took the computers (female workers) three days to compute the trajectory of a shell that took 30 seconds to get to its target.
The first computers are working
See it at Scienceworks!
ENIAC did the trajectory calculation in 5 seconds
Based on switches that control the flow of electricity – electrons to be precise.
On/off, yes/no, true/false, 1/0
binary number system used
off,on,on,off,off 6 = 00110
on,on,off,on,on 27 = 11011
This is machine code- what the computer understands
High level Programming languages
COBOL – businesswords
BASIC – general purpose
Easier to write instructions. Compiled (translated) into machine language
Data entry operator
“There may be a world market for five computers”
CEO of IBM
Brattain, Bardeen, Shockley
1947 – production late 50s
smart mobile phones computers in a pocket
PDAs, phones, cameras in one package
smart clothes – wearing computers