Computers By Michael Walker Copyright: “This power point contains images copyrighted material, and is used under fair use guidelines. Further duplication.

ComputersComputers

By Michael WalkerBy Michael Walker

Copyright: “This power point contains images copyrighted Copyright: “This power point contains images copyrighted material, and is used under fair use guidelines. Further material, and is used under fair use guidelines. Further

duplication or distribution is prohibited.”duplication or distribution is prohibited.”

•Monitor

•CPU

•Keyboard

•Mouse

Credit to: CompUSA

Examples of ComputersExamples of Computers

Desktop: Desktop: Known as the “regular Known as the “regular computer”. This computer is made to set computer”. This computer is made to set on desks or tables (Norton, 5) (note: on desks or tables (Norton, 5) (note: Much like the ones in the classroom)Much like the ones in the classroom)

Notebook: Notebook: Also known as lab top Also known as lab top computers, these computers are much computers, these computers are much smaller than desktops, and can be smaller than desktops, and can be carried around most anywhere (Norton, carried around most anywhere (Norton, 6.)6.)

WorkStation: WorkStation: A computer that has A computer that has more power, and features than a regular more power, and features than a regular desk top computer. These computers are desk top computer. These computers are normally used for people work in a normally used for people work in a setting that reguire more powerful setting that reguire more powerful computers (Norton, 6.)computers (Norton, 6.)

Credit to: best buy

Credit to: compUSA

Credit to: compUSA

IntroductionIntroduction

Computers have become a huge part Computers have become a huge part of our lives. I am going to explode 4 of our lives. I am going to explode 4 useful parts of a computer in some useful parts of a computer in some detail to detail to maybemaybe give my audience give my audience some information that might be some information that might be useful.useful.

Learn About?Learn About? MonitorsMonitors

CPUCPU

KeyboardKeyboard

MouseMouse

MonitorsMonitors

CPUCPU

KeyboardKeyboard

MouseMouse

Exit

MonitorsMonitors

““The most common output device. The most common output device. Monitors are used for seeing the Monitors are used for seeing the processed data by the CPU. Whether processed data by the CPU. Whether that might be a webpage, typed that might be a webpage, typed letters in a word processor, or so on.” letters in a word processor, or so on.” (Norton, 142.)(Norton, 142.)

Examples of MonitorsExamples of Monitors

CRT: CRT: How it works is that a How it works is that a eelectron gun within the monitor. lectron gun within the monitor. “The gun shoots the monitor shoots “The gun shoots the monitor shoots a beam of electrons through a a beam of electrons through a magnetic coil to project the image magnetic coil to project the image shown on the screen. (Norton, 143.) shown on the screen. (Norton, 143.)

Flat Panel: Flat Panel: Now more Now more commonly used, “these monitors commonly used, “these monitors provide the same viewable area as provide the same viewable area as CRT monitors, but they take up less CRT monitors, but they take up less desk space and run cooler than desk space and run cooler than traditional CRT monitors.traditional CRT monitors.

A type of Flat Panel monitorsA type of Flat Panel monitors

LCD- “creates images with a special LCD- “creates images with a special kind of liquid crystal that is normally kind of liquid crystal that is normally transparent, but becomes opaque transparent, but becomes opaque when charged with electricitywhen charged with electricity

DisadvantageDisadvantage Their image is hard to see in bright light Their image is hard to see in bright light

Types of LCDTypes of LCD Passive MatrixPassive Matrix Active matrix Active matrix

(Norton,144-146)(Norton,144-146)

CPUCPU

““The brain of the computer, this is The brain of the computer, this is the place where data is manipulated. the place where data is manipulated. In large computer systems, such as a In large computer systems, such as a supercomputers and mainframes, supercomputers and mainframes, processing tasks, may be handled by processing tasks, may be handled by multiple processing chips” (Norton, multiple processing chips” (Norton, 190.)190.)

Important itemsImportant items

Memory- Memory- A place where programs, and A place where programs, and files are stored. Some more important than files are stored. Some more important than others to the running and maintance of the others to the running and maintance of the computer itselfcomputer itself• Memory allows the CPU to process the information, Memory allows the CPU to process the information,

call up information that it needs to do a tasks, and call up information that it needs to do a tasks, and much more.much more.

• Types of memoryTypes of memory• Non-Volatile Memory- These are chips that hold Non-Volatile Memory- These are chips that hold

data when the computer is unplugged. (also known data when the computer is unplugged. (also known as ROM)as ROM)

• Volatile memory-This is memory that will “hold Volatile memory-This is memory that will “hold programs and and data when they are in use programs and and data when they are in use (Norton, 192.)(Norton, 192.)

(Norton, 190-192.)(Norton, 190-192.)

KeyboardKeyboard

The primary input device, used for The primary input device, used for entering numbers and letters into the entering numbers and letters into the computer. computer. • A standard computer holds about 100 A standard computer holds about 100

keys.keys.

(Norton,104.)(Norton,104.)

Keyboard Key groupsKeyboard Key groups

Alphanumeric Keys

Numeric Keypad

Function keys

Cursor movement keys

Special purpose keys

Credit to: Pics4Learning

How the computer accepts Input How the computer accepts Input from the keyboardfrom the keyboard

When you press a key on the keyboard, it might seem When you press a key on the keyboard, it might seem almost like an automatic process. To show the speed of the almost like an automatic process. To show the speed of the computer, this is what actually happens.computer, this is what actually happens.

““Once a key is pressed a chip known as the keyboard Once a key is pressed a chip known as the keyboard controller which notes that a key has been pressed. This controller which notes that a key has been pressed. This sends a code into the memory called the keyboard buffer to sends a code into the memory called the keyboard buffer to indicate which key was pressed. Once it gets to the system, indicate which key was pressed. Once it gets to the system, it determines what to do with the cod by reading the it determines what to do with the cod by reading the memory location in the key board buffer. Then passes that memory location in the key board buffer. Then passes that code to the CPU” (Norton, 108.)code to the CPU” (Norton, 108.)

MouseMouse

This is the “pointing device” of the This is the “pointing device” of the ocmputer. The mouse allows a ocmputer. The mouse allows a pointer to move around screen. This pointer to move around screen. This is used to “select text; access is used to “select text; access menus; and interact with programs menus; and interact with programs files, data that appear on the screen” files, data that appear on the screen” (Norton, 108.)(Norton, 108.)

Other versions of the mouseOther versions of the mouse

Trackballs: Trackballs: Works like an upside Works like an upside down mouse. Inside of moving the mouse, down mouse. Inside of moving the mouse, you move the exposed ball with your fingers. you move the exposed ball with your fingers. They are good when you do not have space to They are good when you do not have space to move a regular mouse (Norton, 112.)move a regular mouse (Norton, 112.)

Track pads (touch pads):Track pads (touch pads): This is a small area that you can touch to This is a small area that you can touch to move a mouse across the screen. They are move a mouse across the screen. They are usually very small, and used for lab top usually very small, and used for lab top

computers (Norton, 113.)computers (Norton, 113.)

ReferencesReferences

Norton, Petter. (2006) Introduction to Norton, Petter. (2006) Introduction to computers. New York: McGraw Hill computers. New York: McGraw Hill CompaniesCompanies

http://pics.tech4learning.com/ http://pics.tech4learning.com/ http://www.bestbuy.com/http://www.bestbuy.com/ http://www.compUSA.com http://www.compUSA.com