Wheelchairs are used by people for whom walking is difficult or impossible due to illness, injury, or disability. Wheelchairs can have extra cushions and other parts added to improve support if the wheelchair user cannot keep their body in a good sitting position, or to make the wheelchair more comfortable to sit in. The earliest record of the wheelchair in England dates from the 1670s [Oxford English Dictionary, (2nd Ed.), 1989, Vol. XX., p. 203.], and in continental Europe this technology dates back to the German Renaissance.