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.
By law, Social Security has a very strict definition of disability. To be found disabled: â¢ You must be unable to do any substantial work because of your medical condition(s); and. â¢ Your medical condition(s) must have lasted, or be expected to last, at least 1 year, or be. expected to result in your death.