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.
verb (used with object), disabled, disabling. 1. to make unable or unfit; weaken or destroy the capability of; incapacitate: The detective successfully disabled the bomb. He was disabled by the accident. 2. to make legally incapable; disqualify.