Cover     Contents     Summary     Primary     Secondary     Examples     More topics     Glossary     Resources

 

Vertical clearance: The minimum unobstructed vertical passage space required along a sidewalk or trail.

Virtual keyboard: Software used to emulate a keyboard. A picture of a keyboard is displayed on a computer screen and the user points and clicks on the pictures of keys to enter text.

Vision impairments: Complete or partial loss of ability to see, caused by a variety of injuries or diseases including congenital defects. Legal blindness is defined as visual acuity of 20/200 or less in the better eye with correcting lenses, or widest diameter of visual field subtending an angular distance no greater than 20 degrees.

Visual impairment: Loss or partial loss of vision.  See Low vision.

Vocational Rehabilitation Act of 1973: Act prohibiting discrimination on the basis of disability which applies to any program that receives federal financial support. Section 504 of the Act is aimed at making educational programs and facilities accessible to all students. Section 08 of the Act requires that electronic office equipment purchased through federal procurement meets disability access guidelines.

Water bar: A bar made of materials such as wood, rubber, or stone that is placed across a trail to divert runoff across rather than down the trail.

Wheelchair: Wheeled mobility device used by people with limited or no ability to walk. Wheelchairs can be manually propelled or battery powered.

Wilderness Act of 1964: A Federal law that prohibits the use of motorized vehicles and mechanized construction on certain tracts of Federally managed land.

Word prediction: Software that reduces the number of keystrokes needed to type words and sentences. As characters are entered on either a standard, alternative or virtual keyboard, suggested completions of the word that has been started are provided to the user.

World Wide Web (WWW, W3, or Web): Hypertext and multimedia gateway to the Internet.

This page provides a glossary of terms for letters V through W.

Glossary of terms

V - W

Glossary_U.html

Previous page

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

Previous page