computer it 402 class 10th unit 2 notes please help send me
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Answer:
SESSION 1:-WORKING WITH ACCESSIBILITY OPTIONS
Computer Accessibility :- It refers to the user friendliness of a computer system for all,
regardless of their disability. It enables a person with a disability or impairment to use a
computer. It is also known as Assistive Technology.
There are numerous types of impairment that impact computer usage. These includes:-
1) Cognitive impairments and learning disabilities, such as dyslexia, autism, and attention deficit-
hyperactivity disorder (ADHD).
2) Visual impairment, such as low-vision, complete or partial blindness, and color blindness.
3) Hearing impairment including deafness.
4) Motor or dexterity impairment, such as paralysis, cerebral palsy, or carpal tunnel syndrome and
repetitive strain injury.
These accessibility options are used to customize the way your keyboard, display, or mouse
function.
Various Accessibility Options
1) Sticky Keys:- It is an accessibility feature to help computer users with physical disabilities. It
allows the user to press and release a modifier key, such as Ctrl, Alt, Shift etc. and have it
remain active until any other key is pressed.
2) Filter Keys:- It is an accessibility feature that tells the keyboard to ignore repeated key strokes,
making typing easier for people with hand tremors.
3) Toggle Keys:- It is an accessibility feature which is designed for people who have vision
impairment or cognitive disabilities. When toggle keys are turned on, the computer emits a high
sound when the locking keys, such as Caps Lock, Num Lock, Scroll Lock are switched on and a
low sound when they are switched off.
4) Sound Sentry:- It is designed for the users with auditory impairments. It generates warnings,
such as blinking title bar or a flashing border, whenever the computer generates a sound.
5) Show Sounds:- It instructs applications that convey information by sound, to also provide
information visually, through text captions or informative icons.
6) High Contrast:- It is an accessibility feature to assist people with vision impairment. It can
change the size and color of fonts and the background for ease of viewing.
7) Cursor Options:- It is an accessibility feature that assists people with vision impairment by
changing the blink rate and width of the cursor.
8) Mouse Keys:- It is an accessibility feature that assists people who have difficulty using a
mouse. This option uses the keyboard as a pointing device instead of a mouse.
9) Serial keys:- It is an accessibility feature that assists people that have difficulty in using a
keyboard or a mouse or both. They can use special devices such as Sip, Puff and Breath
Switches to provide input to the computer through serial ports.
Explanation:
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