70. 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.