Many law firms specialize in working with clients with disabilities or with the elderly who require legal advice and assistance. These lawyers assist clients who find themselves unable to work due to an illness or injury and require extra assistance to go through the claim process because they often find it difficult to file disability claims. Lawyers who specialize in disability law assist their clients with short-term and long-term disability insurance, ERISA disability insurance and income protection benefits, private pension and other retirement disability plans, and social security issues. They also assist elderly clients and their families with estate planning and with finding adequate housing. Disability law firms and the lawyers who work for them specialize in helping clients file claims against employers and businesses that violate laws that protect the rights of people with disabilities. In the US, the major law that protects the rights of people with disabilities is the Americans with Disabilities Act (ADA), passed in 1990.