Discovering Computer 2008
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Transcript of Discovering Computer 2008
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What Is Input? What Is InputInput device is anyhardware component tha
allows users to enter datand instructions
Data or instrutionentered into memory of computer
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What Is Input?• What are the two types of input?
Data
Unprocessed text,numbers,images,audio,
and video
Instructions
Programs
Commands
User responses
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How is the keyboard divided?
Typing areaNumeric keypad
Function keys,special keys that issue
commands
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What is a mouse?•
Poiting device that fits under palmpf hand
• Pointing devide controls movement
of pointer
• Mechanical mouse has rubber or
metal ball on underside
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•What is an optical mouse?• No moving mechanical parts inside
• Senses light to detect mouse’s movement• More precise than mechanical mouse
• Connects using a cable,or wireless
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Other pointing devices
•What is a trackball?
• Stationary pointing device with
a ball on its top or side
• To move pointer,rotate ball
with thumb,fingers,or palm of
hand
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Other poitingdevices
What is a touchscreen?
• Touch areas of screen with finger
• Often uses with kiosks
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• Looks like a ballpoint pen,but usespressure to write text and draw lines
• Used with graphics tablets,flat electronic
boards
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What is voice input?
• The process of entering input
by speaking into a microphone
• Voice recognition is thecomputer’s capability of
distinguishing spoken words
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What is digitalcamera?Allows you to take digital
picturesImages viewable
immediately on camera
•Download to camera
•Post pictures to web
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What is video input?• Process of entering full-motion images into
computer
• Video capture card is adapter card that
converts analog signal into digital signalthat computer can use
• Digital video(DV)camera records video as
digital signals
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What is a PC videocamera and a web
cam?• PC video camera is used to
capture video and still images,and
to make video telephone calls oninternet
• Also called PC camera
• Web cam-video camera whose
output displays on a web page
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What is scanner?• Light-sensing device that reads
printed text and graphics
• Used for image processing,converting paper
documents into electronic images
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Nurhani Farhanah
Fairuz Hazwani
Mohd. Nazrin
Marvelleryne Rami
Nur Khairunisa
