Here are some guidelines for the right and correct arrangement of the mouse and keyboard: - The mouse should be placed close to the keyboard, within easy reach of the user's preferred hand. This allows the arm to remain close to the body in a relaxed position when using the mouse. - The keyboard should be placed flat on the desk or table, directly in front of the user. It's best if the keyboard is not tilted. - The wrist should remain straight and not bent up or down when typing. The forearms should be parallel to the floor. - The mouse should be positioned next to the keyboard so the user's arm remains close to the body when mousing. This prevents over-reaching and strain

1. COMPUTER BASIC
OPERATIONS
Hotimah, SPd.Si
September, 2012/2013

2. CONCEPT MAP
Computer Basic Operations
Getting to Known Computer Basic Operations
 Components of computer  Turning on computer
 Dangerous parts of  Turning off computer
computer
 Negative effects of
computer for health
 Arrangement of computer
set

3. Introduction
• Definition of computer:
• A set of electronic devices that work together. (Supriyanto &
Fauziah, 2010: 79)
• Computer characteristics:
1. Having a quick and precise accessing ability.
2. Producing information from the previous data.
3. Having the ability to process a large data into information.
4. Having the ability to store a mass of data (up to giga byte).
5. Having the ability to import and export data that is
specially design.

4. QUESTIONS
Why is computer
categorized as an
electronic device?
Find out the
disadvantages of a
computer?

5. Components of computer
Hardware
Software
Brainware (user,
operator, administrator)

6. Hardware
• Hardware is the
machinery and electronic
parts of a computer
system.
• Hardware consist of:
 Input device: keyboard
and mouse
 Processing device: CPU
(Central Processing Unit)
and storage media
 Output device: monitor
and printer

7. Software
• Software is a program containing instructions written in
computer language comprehended by computer hardware.
• Kinds of software:
• 1. Operating system software
• Used as:
a. Interpreter
b. Hardware configuration
c. File management

8. Software
2. Application software
• Used to process electronic data.
Based on the function, application software can divide into
a. Software for word processing
b. Software for spreadsheet processing
c. Software for statistic data processing
d. Software for database processing
e. Software for cad (computer-aided design)
f. Software for image processing
g. Programming language software to make personal
application

9. BRAINWARE
• Brainware is a term used to refer to the people
who work in computer fields.
• Its consist of:
1. User / Operator  a person who operates a
computer
2. Administrator  a person who
organizes/design the work system, work
sequence, data processing, and output

10. DANGEROUS PARTS OF
COMPUTER
1. Monitor
 Produce a highly
intense light.
 A screen filter has to
be placed to avoid
damage on our eyes
due to the light
radiation

11. DANGEROUS PARTS OF
COMPUTER
2. CPU (Central
Processing Unit)
• do not touch directly
with wet hands
because we can be
electrified by electric
current in it.

12. DANGEROUS PARTS OF
COMPUTER
3. Computer’s cables
• Must placed far from
water because it can
cause short-circuit. The
short-circuit. Can cause
fire.
4. Keyboard
 Avoid water spill because it
can cause keyboard to
hang/malfunction
 Keyboard with spilled
water or wet material can
cause short circuit or
electricity us when used.

13. NEGATIVE EFFECTS OF
COMPUTER FOR HEALTH
1. Disturbance on eyes and head (computer vision syndrome).
Such as: pain or headache, dry eyes and irritation, tired eyes,
a weak ability of eyes focus, blurry vision (astigmatism,
myopia, presbyopia), double vision, color disorientation.
2. Disturbance on arms and hands. Such as: ache on the wrist
resulted from tendon disturbance, elbow pain, Carpal Tunnel
Syndrome.
3. Disturbance on neck, shoulder, back, and waist.

14. ARRANGEMENT OF COMPUTER SET
AND THE CORRECT BODY POSITION
• The right and correct arrangement is the best way in avoiding
discomfort and health disturbances.
1. Work place
 Arrange the most comfortable position of computer and
other device.
 Arrange desk with consideration of how the device would
be used.
 Arrange the lighting of your work place optimally.
 Put book, report, or other printed material used while
working near the monitor. You can put under or next to it.
2. Chair and body position
 Choose a comfortable, adjustable, and back-supported
chair.

15. Could you explain the right and correct
arrangement of mouse and keyboard?