Visual Barriers: This includes, but is not limited to, blindness, low vision, and color-blindness.
Auditory Barriers: This includes, but is not limited to, deafness and hard-of-hearing.
Physical Barriers: This includes, but is not limited to, inability to use a mouse, slow response time, limited fine motor control.
Cognitive Barriers: This includes, but is not limited to, learning disabilities, distractibility, inability to remember or focus on large amounts of information.