Exam (elaborations)
Topical Chapter 2 Past papers for Theory ICT IGCSE (0417)
- Course
- Institution
This document contains notes, questions and answers for chapter 2 of IGCSE ICT.
[Show more]
Seller
Follow
notesg
Reviews received
Content preview
Ch.2: Input DevicesI.C.T.
Chapter 2
Input Devices
Eng. Mustafa El-Komy 13 Theory Notes
Eng.
Omar El Safty
,Ch.2: Input Devices
I.C.T.
As the name suggests, input devices are hardware devices that allow data to be
input into a computer. Many such devices exist, ranging from the more common
ones, such as the keyboard, through to the more specialist devices, such as sensors
and barcode readers.
2.1 Pointing devices
They are used to move and control an on-screen pointer or cursor. They are
commonly used with graphical user interfaces (GUIs).
Mouse
The mouse is an example of a pointing device. The user controls the position of a
pointer on the screen by moving the mouse around.
Uses
• Move a pointer on the screen to select items and
options from drop-down menus.
• Draw objects on the screen.
Advantages
• Faster entry of chosen options.
• Faster navigation.
• Smaller than keyboard.
Disadvantages
• Difficult to use for people with disabilities.
• Not suitable to enter text or numeric data.
Touchpad
A pointing device found on most laptops. Used
instead of a mouse since it takes up less
space.
Use
• Used with laptop computers instead of a
mouse.
Advantages
• Integrated within the laptop computer.
• Takes less space
Eng. Mustafa El-Komy 14 Theory Notes
Eng.
Omar El Safty
, Ch.2: Input Devices
I.C.T.
Disadvantage
• More difficult to control compared to a mouse.
Tracker
ball
This pointing device has a large ball that the user spins.
Uses
• For use by people with limited motor skills, e.g.
young children or people with disabilities.
• Used by people with disabilities or RSI.
Advantage
• Easier to use than a mouse.
Disadvantage
• Slower to use compared to a mouse.
2.2 Other input devices
Keyboard
Allows text (abc...), numbers (123...) and symbols (%$@...) to be entered into a
computer
Uses
• Entering text for word processing.
• Applications where text has to be created rather
than copied.
Advantages
• Allows accurate entry of data.
• Quick entry of original text.
Disadvantages
• Constant use can lead to Repetitive Strain Injury.
• Must learn how to type to achieve high input speed.
Eng. Mustafa El-Komy 15 Theory Notes
Eng.
Omar El Safty
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller notesg. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.69. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now