Final answer:
The landmark legislation that provides protection for the disabled in employment and in public facilities is the Americans with Disabilities Act (ADA) of 1990.
Step-by-step explanation:
The landmark piece of legislation that provides protection for the disabled in employment and in public facilities is the Americans with Disabilities Act (ADA) of 1990. This act prohibits discrimination in employment based on disability and requires employers to provide reasonable accommodations for disabled workers. It also mandates that public facilities, such as ramps and elevators, be made accessible to individuals with disabilities.