Khgl

Kayla Ryan
Computer Applications
Notes
01-08-13

A. 1st Generation, Vacuum tube;2nd Generation, Transistors;3rd Generation, intergraded circuits; 4th Generation, Silicon chips * “Computer”- Person good at math before war; by WW1 the definition is now called a “machine.” It used arithmetic back when it first came out. * It took 28 years of William Shanks life to calculate a computer. Word computer referred not to a machine but to calculate on paper. * Charles Babbage-made a different machine 120 years ago * Ada Byron-Countess of Lovelace 1st computer programmer * ”Punch cards”-Jacquard * Zuse- A German engineer invented computer he used telephone relays. Relays- on and off binary system counting 0 to 10 switch in the on position equals one off position equals 10. Binary numbers could be added and subtracted to do computer arithmetic would need 100’s of switches * Vacuum tubes- University of Pennsylvania – U. S. Army ComputerMissile firing tables. ENIAC- Eckert & Mauchley-Electronic computer with greater than 10,000 vac tubes, it took up a lot of space this machine was 50’ by 30’ big electronic computer was made by 1946. Used 18,000 vacuum tubes in one machine and made it work. Switches on the ENIAC would activate or deactivate the machine * Alan Turing-That anything that had logic to it could be computerized, it’s not just math; he fought differently. * Colossuses began working in 1983 began out the steps much like a code breaker and wasn’t leaked out in more than 30 years it was so secret it helped crack codes for war. * Each generation has gotten smaller and smaller and cheaper and is still improving. We are still in the 4th generation. * Input-Every way to get information in * Output-Look at the screen, print it out, or resolute * Processor-A CPU like a brain to make it all operate * Storage-Hard drives, flash drives, discs, CDs, SD cards to store everything on all these things so we don’t have to redo we just modify instead of redoing everything. B. Computer’s and Hacking * l-Commerce-using technologies which provide location information, such as GPS, for business purposes * Software-the programs and other operating information used by a computer * Hardware-the machines, wiring, and other physical components of a computer or other electronic system * Bit=Binary Digit * Byte=8 Bits symbols, letters * Kilobyte=1000 bytes (Kilo) * Megabyte=1 Million bytes (Meg) * Gigabytes=1 Billion bytes (Gig) * Terabyte=1 Trillion bytes (Tera)