Under The Hood Biscain Mora Period 1 92012

Under The Hood Biscain Mora Period 1 9/20/12

Saving Files • On PC and Mac • • • My recent documents My documents Desktop My computer My network places • At School you go to my computer and then click the adobe with your last name

Software • There are two broad classifications of software, operating system software and application software. • The operating system is installed on your hard disk before any other software. The instructions come from the disk, so the operating system is disk-based. controls how your computer's hardware communicates with the CPU, and it runs software applications. • Any activity you put your computer to use for can be considered an application. Typing a letter is done with a word processing application. Keeping track of your hourly wages is a spreadsheet application. Playing computer golf is a recreational application. • A database is an organized collection of logically-related data. It keeps record of all the things you do on the computer

Hardware • The most important hardware on your PC is the motherboard. Without it nothing can be used. Everything is connected to it. The motherboard is the one that connects everything to everything. The second most important is the CPU. It is the brain of the PC, a motherboard can't run without it. Then comes RAM is the memory that the computer uses to run, without RAM you won't be able to install any operating system, and even if you have it, you would need a hard drive. So the hard drive comes after the RAM. Then the keyboard, without it you can't install an operating system to the computer, and you won't be able to tell the computer what to do. And also a monitor is needed to display everything you're doing.

History of computer • • • 1937 Alan Turing: Alan Turing develops the concept of a theoretical computing machine. 1943 Enigma: Adolf Hitler uses the Enigma encryption machine 1939 George Stibitz: George Stibitz develops the Complex Number Calculator - a foundation for digital computers 1948 Andrew Donald Booth: Andrew Donald Booth invents magnetic drum memory 1953 The IBM 701 becomes available and a total of 19 are sold to the scientific community 1955 Bell Labs introduces its first transistor computer. 1962 The first computer game: The first computer game Spacewar Computer Game invented BY Steve Russell & MIT 1991 The World Wide Web: The World Wide Web is launched to the public on August 6, 1991 1998 Google: Google is founded by Sergey Brin and Larry Page on September 7, 1998 2002 Approximately 1 billion PCs been sold

Units of measurements • • • Bit 0 -1 Byte 8 bits Kilobyte 1, 024 bytes Megabytes 1, 024 KB Gigabytes 1, 024 MB Terabyte 1, 024 GB Petabyte 1, 024 TB Exabyte 1, 024 PB Zettabyte 1, 024 EB Ram-Random Access Memory provides space for your computer to read and write data to be accessed by the CPU

First PC • John Blankenbaker made the first computer, the Kenbak-1. His garage was the company’s headquarters. He used small and medium scale integrated circuits on a single circuit board.

First Laptop • William Moggridge made the first laptop Designed in 1979

Virus, Worm, Trojan Horse • A computer virus is a computer program that can replicate itself and spread from one computer to another. • A computer worm is a standalone malware computer program that replicates itself in order to spread to other computers. Often, it uses a computer program to spread itself. • A Trojan horse is a type of malware that masquerades as a legitimate file or helpful program possibly with the purpose of granting a hacker unauthorized access to a computer

Famous computer companies • Dell: Michael S. Dell • HP: David Packard, William Reddington Hewlett • Apple: Steve Jobs, Steve Wazniak • Microsoft: Bill Gates, Paul Allen • Yahoo: Jerry Yang, David Filo

Bibliography • http: //etc. usf. edu/techease/mac/files-sharing/how-do-i-save-my-work -on-a-mac/ • http: //www. adita. com/three-d. htm • http: //www. adita. com/literacy. htm • http: //answers. yahoo. com/question/index? qid=20080921094856 AAc ISPN • http: //www. wu. ece. ufl. edu/links/data. Rate/Data. Measurement. Chart. ht ml