An assistive device used to catch the attention of a professor: an alternative to a student having to raise their hand.

The Americans with Disabilities Act (ADA) applies to websites. A digital divide occurs when websites deny access, isolate and deprive users who live in rural areas, have older computers, are sick, visually impaired, with temporary or permanent physical limitations such as - broken bones, cancer, lymphedema, cataracts, strokes, and palsy.