2. Why Study Basic Terms?
⢠For some people, the computer aisles at an
electronics store can be quite a mystery!
⢠Prepare for the State Skills Test
⢠Use computers in your future with ease and
confidence
3. What is a Computer?
⢠An electronic device that you can use to
manipulate, store, retrieve and process data.
6. Software
⢠A term that is used in contrast to hardware;
everything in the computer that is not
hardware is software.
⢠Software allows you to:
â Process words
â Calculate numbers
â Send an e-mail
â Browse the Internet
â And many moreâŚ
7. Input
⢠A collection of raw data from the outside
world that is put into the computer.
⢠Example: The payroll clerk collects workers'
timecards so she knows how many hours each
person worked and then types the hours from
the timecards into a spreadsheet.
8. Input Devices
⢠Keyboard
⢠Mouse
⢠Scanner
⢠Digital Camera
⢠Bar code reader
⢠Graphic tablets
⢠And many moreâŚ
9. Processing
⢠Manipulating data
â Bold, italicize, underline, double space in a word
processor
â Enter formulas and calculate totals in a
spreadsheet
â Edit a picture
10. Storage
⢠The place where data is held when it is not needed for
processing
⢠Storage Devices are computer components capable of
storing digital data
⢠Examples of Storage Devices:
â Floppy Disk (almost obsolete)
â Hard Drive
â CD, DVD
â Flash Drive
11. Output
⢠The results of processed data
⢠Examples of output:
â A printed paper
â A presentation
â Audio
â Video
⢠Data is entered through various forms (input) into a
computer, the data is manipulated (processing), and
then information is presented to a human (output).
15. Input and Output Devices
⢠As you continue, you will
review several different
input and output devices.
⢠You need to be able to
identify each device, tell
if it is an input or output
device and indicate what
the devices are used for.
16. Keyboard
⢠The most commonly used input device
⢠It is made up of :
â Alphabetic Keys
â Numeric Keys
â Function Keys
â Command Keys
⢠Connected to the computer through a
USB connection or wirelessly
17. Mouse
⢠A hand-operated input device that controls
the cursor on the screen as you move it
around on a desktop
⢠Older = ball style mouse
⢠Newer = âopticalâ technology
⢠Turn over your mouse. Do you see a red light?
If you do, then you are using an optical
mouse.
18. Touchpad
⢠An input device used to move the cursor on a
laptop computer
⢠As you slide your finger over the surface,
sensors underneath detect the movement,
direction and speed
⢠Useful when carrying a mouse is not practical
19. Trackball
⢠A pointing device that works like a mouse turned
upside down; the ball in on top of the device
⢠Advantages:
⢠TrackBall is stationary so it does not require much
space.
⢠You can place a trackball on any type of surface,
including your lap.
20. Joystick
⢠Joysticks are input devices, similar to a mouse,
that allow you to move the cursor in any
direction
⢠Joysticks were originally used by pilots as part
of an airplane's controls. Technology
developed to let gamers experience a more
realistic game environment
21. Microphone
⢠A microphone is used to input sound
⢠The sound is detected by the microphone and
an electronic signal is transmitted to the
computer
⢠Special hardware is used to convert the analog
data (sound) into digital data so it an be
stored and manipulated on the computer.
22. Scanner
⢠Scanners are used to convert images or text
on paper into a digital image format (.bmp, .gif, .jpeg)
⢠Scanners with optical character recognition
can convert text on paper into text that can be
edited in a word processor
23. Web Cam
⢠Web cam is short for âweb cameraâ
⢠It is an input device that captures a video or
image of the scene in front of it
⢠Some are built into the computer (i.e. Laptop),
others are connected via USB cable
⢠Used for chatting online, security and tourism
(i.e. view your favorite animal at the zoo
online)
24. Graphics Tablet
⢠Graphics tables are used by graphics designers
and illustrators to input data
⢠Create accurate drawings on a screen that
could not be produced with a mouse or stylus
⢠Usually consists of a tablet that you draw on
and a pen that has pressure sensitive tips
allowing the artist to draw heavier and lighter
lines
25. Biometric Devices
⢠AKAâAccess Control Devices
⢠Uses a body feature of a person seeking access to identify
and authorize that person
â Fingerprint scanner
â Iris scan
â Access card (can be scanned like a credit card or contain a radio
frequency transmitter used to identify the card holder)
⢠Britain and Germany have included a microchip in their
passport. The microchip contains electronic data unique to
each user
26. Monitor
⢠Most commonly used output device
⢠The picture on a monitor is made up of tiny
colored dots called pixels
⢠The quality and detail of the picture depends
on the number of pixels that the monitor can
display
27. Ink Jet Printer
⢠An output device that produces a hard copy by
spraying ink on paper
⢠Relatively cheap to buy
⢠Can print it both black and white or color
⢠Limitations:
â Slow
â Not designed for high-volume printing
â Ink cartridges are expensive
28. Laser Jet Printer
⢠A output device that prints similar to a photo
copy machine
⢠Uses powdered ink called âtonerâ to fuse onto
the paper by heat and pressure
⢠Black and white versions are relatively cheap
to purchase
⢠Capable of quick high-volume printing
29. Speakers
⢠Most computers have a small internal speaker
that produces beeping sounds when you make
an error
⢠Computers can be fitted with a sound card
which enables sound (audio) to be output
through external speakers
30. Digital Camera
⢠An input device that takes photographs and
stores them as digital files on a computer
31. Projector
⢠A device which connects to a computer and is
used to project the output from the computer
onto a wall or screen.
32. Touch Screen
⢠The only device that serves as both
an input and output device
⢠You view the options available to you
on the screen (output) and then use
your finger to touch the option you
have chosen (input)
33. Plotter
⢠A large document printer which is able to
draw high quality images on very large pieces
of paper (example: 3 feet wide by 10 feet
long)
⢠Used by:
â Engineers
â Architects
â Map makers
Fingerprint scanner is a common biometric device on personal computers. Can be used in place of a login and password to gain access to computer files or folders. Prints stored on the computer. If the print matches, access to the computer is granted.