Microsoft Office 2007 – Illustrated Introductory, Premium Video Edition Understanding Essential Computer Concepts

2 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Investigating Data Processing Kilobyte (KB) = one thousand bytesKilobyte (KB) = one thousand bytes Megabyte (MB) = one million bytesMegabyte (MB) = one million bytes Gigabyte (GB) = one billion bytesGigabyte (GB) = one billion bytes Terabyte (TB) = one trillion bytesTerabyte (TB) = one trillion bytes

3 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Memory Computer memory is a set of storage locations.Computer memory is a set of storage locations. There are five types of memory:There are five types of memory: Random access memory (RAM)Random access memory (RAM) Cache memoryCache memory Virtual memoryVirtual memory Read-only memoryRead-only memory Complementary metal oxide semiconductor memory (CMOS)Complementary metal oxide semiconductor memory (CMOS)

4 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Memory RAMRAM Temporary memory that is constantly changing while the computer is on.Temporary memory that is constantly changing while the computer is on. Also called volatile memory and temporary memory.Also called volatile memory and temporary memory. Cache memoryCache memory Special high-speed memory chip on the motherboard or CPUSpecial high-speed memory chip on the motherboard or CPU Stores frequently and recently accessed data and commands.Stores frequently and recently accessed data and commands.

5 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Memory Virtual memory is extra memory that simulates RAM if more is needed.Virtual memory is extra memory that simulates RAM if more is needed. Read-only memory (ROM) is the permanent storage location for a set of instructions the computer uses.Read-only memory (ROM) is the permanent storage location for a set of instructions the computer uses. CMOS memory is semi-permanent information about where essential software is stored.CMOS memory is semi-permanent information about where essential software is stored.

6 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Storage Media Common magnetic storage devices hard disks— several magnetic oxide covered metal platters usually sealed in a case inside the computer tape— inexpensive and slow storage when back up of large quantities of data is necessary floppy disks— flat circles of magnetic oxide-coated mylar enclosed in a hard plastic case; almost obsolete

7 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Storage Media Types of optical storage devicesTypes of optical storage devices CD—can store 700 MB of dataCD—can store 700 MB of data DVD—can store between 4.7 and 15.9 GB of dataDVD—can store between 4.7 and 15.9 GB of data Blu-ray discs and HD-DVD can store between 15 and 50 GB of dataBlu-ray discs and HD-DVD can store between 15 and 50 GB of data

8 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Storage Media Flash memory—similar to ROM except that it can be written to more than once. Flash memory cards small, portable cards encased in hard plastic used in digital cameras, handheld computers, video game controllers, and other devices

9 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Understanding Storage Media USB flash storage device (USB drive, flash drive) popular type of flash memory available in a wide range of sizes from 32 MB to 16 GB plug directly into the USB port of a personal computer are about the size of a pack of gum and often have a ring that you can attach to your key chain.

10 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Erasing and Rewriting on CDs and DVDs CD-ROMs are for “read-only” access.CD-ROMs are for “read-only” access. CD-R drives allow you to record data on a CD-R disk.CD-R drives allow you to record data on a CD-R disk. CD-RW drives allow you to write data on a CD-RW disk and access and modify data.CD-RW drives allow you to write data on a CD-RW disk and access and modify data. DVD-R and DVD+R are recordable.DVD-R and DVD+R are recordable.

11 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Exploring Data Communications Data communications is the transmission of text, numeric, voice, or video data from one computer to another.

12 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Exploring Data Communications Parallel portParallel port transmits data eight bits at a timetransmits data eight bits at a time Serial portSerial port transmits data one bit at a timetransmits data one bit at a time SCSI portSCSI (small computer system interface, pronounced “scuzzy”) port provides an interface for one or more peripheral devices at the same portprovides an interface for one or more peripheral devices at the same port USB portUSB (Universal Serial Bus) port a high-speed serial port which allows multiple connections at the same porta high-speed serial port which allows multiple connections at the same port

13 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Exploring Data Communications Sound card portSound card port usually includes jacks for speakers and a microphoneusually includes jacks for speakers and a microphone Ethernet portEthernet port used to connect to another computer, a LAN, a modem, or sometimes directly to the Internetused to connect to another computer, a LAN, a modem, or sometimes directly to the Internet allows data to be transmitted at high speeds.allows data to be transmitted at high speeds.

14 Microsoft Office 2007-Illustrated Introductory, Premium Video Edition Exploring Data Communications Computer ports and connections Power connection Mouse port FireWire port Network port Phone line connection Speaker and microphone connections USB ports Monitor port Audio connection Keyboard port