The American Cancer Society (ACS) conducts educational programs and offers many services to people with cancer and to their families. Staff at the toll-free numbers have information about services and activities in local areas and can provide referrals to local ACS divisions.

Cancer.Net is the information website of the American Society of Clinical Oncology (ASCO) for people living with cancer and for those who care for them. ASCO is the world's leading professional organization representing physicians of all oncology subspecialties. Cancer.Net provides current oncologist-approved information on living with cancer.

The National Cancer Institute (NCI) is a U.S. government agency that provides up-to-date information about the prevention, detection, and treatment of cancer. NCI also offers supportive care to people who have cancer and to their families. NCI information is also available to doctors, nurses, and other health professionals. NCI provides the latest information about clinical trials. The Cancer Information Service, a service of NCI, has trained staff members available to answer questions and send free publications. Spanish-speaking staff members are also available.

The National Women's Health Information Center (NWHIC) is a service of the U.S. Department of Health and Human Services Office on Women's Health. NWHIC provides women's health information to a variety of audiences, including consumers, health professionals, and researchers.

The Women's Cancer Network (WCN) is an interactive Web site developed by the Gynecologic Cancer Foundation. Their goal is to help women who have developed cancer. Links at this Web site offer information on different types of cancer, treatment options, ways to improve quality of life, genetics and hereditary cancer risks, and other background information, such as understanding test results.