In this Chapter:
"display screen equipment" means any alphanumeric or graphic display screen, regardless of the display process involved;
"employee" means an employee who habitually uses display screen equipment as a significant part of his or her normal work;
"workstation" means an assembly comprising display screen equipment, which may be provided with a keyboard or input device or software, or a combination of the foregoing determining the operator and machine interface, and includes - (a) a work chair and work desk or work surface, (b) any optional accessories and peripherals, and (c) the immediate work environment of the display screen equipment.