Computer environmental control units for the severely physically disabled

Environmental Control Units (ECU) range from inexpensive three-function devices to sophisticated computer systems which also have communication, recaretion, and other capabilities as well. Four commercially available systems are described in terms of hardware and software requirements, method of access, method of environmental control, and descriptions of additional capabilities. Attention is given to other products that may be required for accessing the computer, including keyguards, special keyboards, and various switches. Criteria for choosing appropriate candidates and systems is discussed as well as implications for the occupational therapist.