Presentation on theme: "AN INTRODUCTION TO COMPUTERS THIS CLASS IS DESIGNED AS A BEGINNERS CLASS IN COMPUTING."— Presentation transcript:
AN INTRODUCTION TO COMPUTERS THIS CLASS IS DESIGNED AS A BEGINNERS CLASS IN COMPUTING
OBJECTIVES Learn Basic Computer Terminology Difference Between Hardware and Software Understanding Computer Components Basic Keyboard and Mouse Usage Proper Care For your PC
PREREQUISITES There are no prerequisites.
DEFINITION What is a Computer? com·put·er Pronunciation key (km-pytr) n. A device that computes, especially a programmable electronic machine that performs high-speed mathematical or logical operations or that assembles, stores, correlates, or otherwise processes information. One who computes. (American Heritage Dictionary, 4 th ed. Pub. 2000)
THE LANGUAGE OF COMPUTERS Binary Numbers
Binary Numbers 1 of 3 Computers speak binary. Binary language consists of combinations of 1's and 0's that represent characters of other languages (in our case the English language). Dont make the mistake of thinking that little 1's and 0's are running around inside of the computer. We humans prefer to think of 1's and 0's because its easier than visualizing positive and negative current flows or open and closed circuits which is what actually happens inside computers. A combination of eight bits represents one character in our language. One character in our language (eight bits) is referred to as a byte. (For example: is a byte that represents an uppercase A; each 1 or 0 is a bit.)
Binary Numbers 2 of 3 Kilobytes, Megabytes, and Gigabytes If you understand that a byte is one character in our language, youve got it made because: 1000 bytes = 1 kilobyte (1,000 characters = 1 kilobyte) 1,000,000 bytes = 1 megabyte (1,000,000 characters = 1 megabyte) 1,000,000,000 bytes = 1 gigabyte (1,000,000,000 characters = 1 gigabyte)
Binary Numbers 3 of 3 Disk Capacity Its important to know how large your files are because eventually you wont have enough space on your disk to hold more files. Knowing the total capacity of your disk, how much space is left on your disk, and how large the file is, you can make accurate decisions as to whether to save the file to the current disk, or save the file to a different diskette with more disk capacity. Keep in mind that a low density floppy diskette holds 720 kilobytes of data, and a high density floppy diskette holds 1.44 megabytes of data. Put in easier to understand terms, a low density disk can hold approximately 300 typed pages and a high density can hold approximately 600 typed pages. Zip disks have 100 megabytes of disk capacity (about $10.00 each) or 250 megabytes of disk capacity (about $15.00 each). CD-ROMS have 650 megabytes of capacity (about $1.00 each) or 700 megabytes of capacity (about $1.50 each). Super Disks have 120 megabytes of disk capacity (about $12.00 each). Hard drives (disk drives inside of the computer) might hold anywhere from 30 megabytes (old computers) to 80 gigabytes (new computers) of data. Most computers today are sold with anywhere from a 5 gigabyte (portable/laptop computers) to a 120 gigabyte (desktop computers) disk capacity.
THIS IS A FEW OF THE DIFFERENT TYPES of COMPUTERS Desk top Lap Top Hand Held computer Computer computer
DEFINITION Hardware Vs. Software If you can touch it, its hardware
Examples of Hardware
The Programs that are on the disks are software
Definition of User
Uses for a PC Word Processing Desktop Publishing Database Management Spreadsheets Communication Finance Education Entertainment News and Information Doorstop
Tips for Beginners Explore Your Computer Mistakes wont Kill You EDIT/ UNDO is your Friend Be persistent Apply what you Learn Dont try to learn too fast Walk away if you get frustrated Have Fun
Why Learn This Stuff? Buying a PC Having Your PC Serviced Calling For Support Be able to talk to Friends & Grandchildren Its Fun
Hardware Overview PC Versus MAC
Examples of PC computers
Examples of MAC computers
SYSTEM COMPONENTS CPU/PROCESSOR The CPU refers to the microprocessor chip. Sometimes the Tower is called the CPU. Its speed is measured in Megahertz (MHZ) (Millions of cycles per second) or Gigahertz (GHZ) Billions of cycles per second. (A cycle is the time required for the CPU to execute an instruction step).
SYSTEM COMPONENTS Ram – Random Access Memory Ram is the memory used by the computer to run programs. The amount of Ram available will determine how fast a program will run and how many windows can be open at one time. Ram memory is considered Volatile because it disappears when the power is turned off.
SYSTEM COMPONENTS Hard Drive The Hard Drive is the computers main, long term storage. It is referred to as non-volatile storage, because it does not disappear when the power is turned off. The size of the Hard Drive is measured in Gigabytes. (Billions of Bytes).
RAM VERSUS HARD DRIVE If we use the analogy of a desk: Then the work we are doing on the desk top would be using the RAM and the work we store in the file drawers would be on the HARD DRIVE.
SYSTEM COMPONENTS Mother Board (This is where most of the electronics is located).
SYSTEM COMPONENTS Case (Tower,Chassis,Box)
SYSTEM COMPONENTS Modem (Modulator Demodulator). (Used for internet access with phone line).
SYSTEM COMPONENTS Power Supply 250 – 500 Watts DO NOT OPEN (This is the power source that makes everything go).
SYSTEM COMPONENTS Audio Card This is the voice of your system).
SYSTEM COMPONENTS Floppy Drive – 1.44 MB (This item is fast becoming obsolete).
SYSTEM COMPONENTS Network Card (Used to connect to high speed internet access e.g. Cable or DSL lines).
SYSTEM COMPONENTS Tape Drive Can store Gigabytes of data.
SYSTEM COMPONENTS Video Card (Provides visual images to the monitor. Also used in computer games, to provide additional memory for visual effects).
PERIPHERALS Monitors CRT Vs LCD
PERIPHERALS Printers (Might be Ink Jet, Bubble Jet, Laser or whatever the manufacturers invent tomorrow).
Video Cameras (Also called webcams)
POWER PROTECTION Uninterruptible Power Supply (UPS) 280 VA – 400 VA (Essentially a battery back-up in case of a power failure)
KEYBOARD The Keyboard (This is the primary input device)
KEYBOARD Alphanumeric Keys
KEYBOARD Numeric Keypad
KEYBOARD Enter (Return) Key
KEYBOARD Modifier keys: CTRL, ALT, SHIFT
KEYBOARD State keys: Caps, Scroll, Numlock
KEYBOARD Windows keys
MOUSE Holding the mouse Grip between thumb and ring finger (Right handed grip shown, Lefties use other hand)
MOUSE Mouse Pointer
MOUSE Left Clicking
MOUSE Right clicking
MOUSE Double clicking (Use the left side, Click twice)
MOUSE Click and drag
MOUSE Scroll wheel and optional buttons
SOFTWARE Operating systems Applications Data
OPERATING SYSTEMS MS-DOS Windows 95,98,Me Windows NT, 2000,XP Linux
APPLICATIONS MS Word (Your basic Word Processor)
APPLICATIONS MS Excel Your basic Spread Sheet)
APPLICATIONS MS Power Point (For sales presentations)
APPLICATIONS MS Outlook (Your desktop Personal Information Manager, (PIM))
APPLICATIONS MS Internet Explorer (Your internet Browser)
APPLICATIONS Windows Calculator (Your basic calculator, also available is a scientific calculator)
APPLICATIONS WordPerfect Adobe Acrobat Lotus Photoshop QuickBooks Notepad CorelDraw WinZip HyperCam Media Player Photo Paint StarCraft ETC. ETC. ETC. ETC. Ad Infinitum
DATA Letters written using a word processor like MS WORD. Spread sheets designed in EXCEL. Presentations created in Power Point Music on a CD. Photos from your digital camera
COMPUTER CAVEATS Beverages in open containers are EVIL.
COMPUTER CAVEATS Magnets (They destroy Data on floppy drives and hard drives)
COMPUTER CAVEATS Laser Printers and Power. Keep PC off the floor. When in doubt Reboot.
COMPUTER CAVEATS Save your work often.
COMPUTER CAVEATS Power Strips Use the Power buttons on the PC and peripherals.
COMPUTER CAVEATS Dont eject a floppy when the light is on.
COMPUTER CAVEATS Keep floppies out of sunlight.
COMPUTER CAVEATS Proper handling of CDs OK to wash CDs in mild soapy water or get a CD cleaner (inexpensive)
COMPUTER CAVEATS Dont push the CD tray in – use the button.
COMPUTER CAVEATS Dust Kills Its a good idea to blow the dust out of your computer regularly.
COMPUTER CAVEATS STATIC KILLS! Get yourself an anti static strip or mat.
TIME FOR A STRETCH BREAK TIME TO GET UP AND STRETCH CLEAN YOUR GLASSES GO POTTY IF YOU HAVE THE URGE LETS TAKE A TEN MINUTE BREAK
AN INTRODUCTION to WINDOWS XP This is the operating system most of us will be using
FILES AND FOLDERS
Keyboard command WordAccessExcelPowerPoint Ctrl-ASelect entire document Select all Ctrl-BBold Ctrl-C or F3Copy Ctrl-Fn/aFind n/a Ctrl-GGo ton/a Ctrl-Hn/aReplace textn/a Ctrl-IItalicsn/a Italics Ctrl-Mn/a Format a number Add (create) slide Ctrl-NNew document New presentation Alt-Nn/aCreate a new object n/a Ctrl-OOpen Ctrl-PPrint Ctrl-QQuit Ctrl-Rn/aNew recordFill Rightn/a Ctrl-TABSave asDisplay PageSave asn/a Ctrl-SSaveSave QuerySave Ctrl-UUnderlinen/aUnderlineUnderline Text Ctrl-VPaste Paste text Ctrl-XCut Ctrl-ZUndo Ctrl-1 (one)n/a Format Celln/a
Keyboard command WordAccessExcelPowerPoint F1Help F7Spell/grammar check Spell check Ctrl-[n/a Decrease font size Ctrl-]n/a Increase font size
Shortcuts when selecting text
THE WIMP INTERFACE W INDOWS I CONS M ENUS P OINTERS
POINTERS (CURSORS) I-beam cursor (which follows the roll of the mouse) Insertion point cursor F letcher (Which flashes on and off, and is positioned using the I-beam cursor and a click of the mouse button)
BREAK POINT Lets get some hands on experience Find the Windows key. –B–Bottom row second key from the left side. –P–Press once, (this is the same as left clicking on the start button). –B–Bring the cursor arrow over the All Programs Arrow head. –N–Notice how the program files are displayed.