To understand why Linux has become so popular, it is helpful to know a little bit about its history. The first version of UNIX was originally developed several decades ago and was used primarily as a research operating system in universities.
Usage Note: Disabled is the clear preference in contemporary American English for referring to people having either physical or mental impairments, with the impairments themselves preferably termed disabilities.
What is the definition of disability under the ADA? It is important to remember that in the context of the ADA, âdisabilityâ is a legal term rather than a medical one. Because it has a legal definition, the ADAâs definition of disability is different from how disability is defined under some other laws. The ADA defines a person with a disability as a person who has a physical or mental impairment that substantially limits one or more major life activity. This includes people who have a record of such an impairment, even if they do not currently have a disability.