COMPUTER APPLICATION
- COMPUTER IN EDUCATION
edu.uptymez.com
1) Gathering information from the internet
2) Develop science project
3) Teaching and learning process
COMPUTER IN HEALTH
In health computer are used for
1) Diagnosing illness
2) Modifying parents health development
3) Assisting surgeons
COMPUTER AT HOME
1) Writing letter
2) Listening music
3) Playing games
4) Watching movies
COMPUTER IN LAW ENFORCEMENT POLICE
In law enforcement police, computer is used as
1) Storage of information
2) Making documents and printing the documents
3) DNA finger printing
COMPUTER IN MUSIC INDUSTRY
1) Composing music
2) Editing sound
3) Editing video
INPUT:
This is unprocessed data which enter in a computer.
TYPES OF INPUT
1) DATA
Is the raw facts given to the computer.
2) PROGRAMS
Are the sets of instruction to direct the computer.
3) COMMANDS
Are special codes or key word that the user input to perform a task like RUN accounts
INPUT DEVICES: These are the devices used to enter data into a computer
⇒Examples of input devices:-
i)KEYBOARD: It is the most important input device
STANDARD KEYBOARD: Have approximately 101 to 106 keys
TYPES OF KEYS
a) Letter keys : A to Z
b) Number keys : 0 to 9
c) Direction or cursor keys : ( up , down , right , left keys)
d) Punctuation keys
e) Symbols keys.
f)Specials keys ( Esc, Enter , Tab, DEL, Shift, Alt, Ctrl, Ins, Page up, Page down , Home, caps Lock, Scroll tack , Print , Screen end)
g) Function key. f1, f2, …… f12
ADVANTAGES
a) Reliable for data input and number
b) Usually supplied with computers so no additional cost
c) Specialized keys are available
ii)DIGITAL CAMERA
The input device which take photograph and convert into digital image.
HOW CAMERA WORKS
The light from the object pass through the lens to the light, Sensor and convert it into digital image then image is taken to the memory chips from the memory chips image.
iii) MAGNETIC STRIPE READER
Magnetic stripe: These ate thin strips of magnetic tape which are usually found on the back of credit and debit cards.
ADVANTAGES OF STRIPE READER.
a) Simple to use
b) Data can be altered
c) Cheap to produce magnetic stripe
iv) JOYSTICK
Input device control the movement of a pointer on the screen just like mouse. Usually used for playing computer games.
v) MICROPHONE
Used to in-put sound into a computer
vi) VIDEO DIGITIZER
This device is used to convert analogue signals from a video camera or video cassette recorder into a digital format.
The digitized video data can be saved as a file or played on the screen interface used: Fire wire
vii) MIDI INSTRUMENT
These are devices used to produce music.
They have Midi- port with specialized software digitized music into digital data so as a file.
a)Stored as a file
b)Edited
c)Displayed on screen
viii) REMOTE CONTROL
It is a device which emits a beam of infra- red light carrying digital data to a TV.
ADVANTAGES
a) Simple to use
b) Each button has a specific function
ix) BAR CODE READER
Input device used to read bar codes and send data into a computer.
BAR CODES: Are patterns of printed lines of different thickness
OUT PUT
This is the processed data from a computer.
TYPES OF OUTPUTS
1) SOFT COPY OUTPUT
This is intangible / untouchable output.
2) HARD COPY OUT PUT
This is the tangible / touchable output e.g. printed page