2Hardware Review Motherboard Processor / CPU Bus Bios chip Memory Hard driveVideo CardSound CardMonitor/printerPorts
3Software Software = Computer Program = Instructions Allow you to use your computerWithout software, the computer is useful as a planter
4Computer memory BIOS (flash memory) Read Only Memory (ROM) Random Access Memory (RAM)chips on motherboardopen filesVirtual (part of your OS)pagefile.sysVideographics and games
5Memory factsStored in KB (kilobytes), MB (megabytes), GB (gigabytes), TB (terabytes)One MB ~ 1 million memory locationsA memory location (byte) stores one characterSo, 512 MB will store about 512 million characters.One MB can store about 500 pages of text information
6Booting order 1, 2, 3 . . . BIOS Operating System Utilities Windows or LinuxOS X on an AppleUNIX on a Sun stationUtilitiesAntiVirus softwareInternet securityApplication software
7BIOS Stores date and time Basic hardware settings Memory and hard drive infoDisk boot orderBoot passwordEtc.
15Using SoftwareWhen you open an application, memory must be used to store the program that’s running and the file you have open.Open files are stored in RAM chips.Physical chipsTemporary storage of files and instructionsWhen files are too big to fit in RAM, the excess goes to Virtual Memory (on the hard drive).The video is stored in Video memory, often in special chips on the Video card.
16Creating Files Sometimes you don’t need to save … Listing to music Playing gamesSurfing the NetWhen you do need to save a file, you must select a storage device.In this class, you will save to your number; your personal drive on the school network.At home, you probably save to the C drive; the hard disk in your computer.
17Storage devices Can be internal or external Measured in: Size (MB, GB, TB)Speed (mHz)Hard drive (contains disk)FloppyCD/DVDFlash – static devices (no moving parts)Floppy disk image from