The American Cancer Society (ACS) is the "nationwide community-based voluntary health organization" dedicated, in their own words, "to eliminating cancer

Cancer

Cancer , known medically as a malignant neoplasm, is a large group of different diseases, all involving unregulated cell growth. In cancer, cells divide and grow uncontrollably, forming malignant tumors, and invade nearby parts of the body. The cancer may also spread to more distant parts of the...

 as a major health problem by preventing cancer, saving lives, and diminishing suffering from cancer, through research, education, advocacy, and service."

The society is organized into twelve geographical divisions of both medical and lay volunteers operating in more than 900 offices throughout the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and Puerto Rico

Puerto Rico

Puerto Rico , officially the Commonwealth of Puerto Rico , is an unincorporated territory of the United States, located in the northeastern Caribbean, east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands.Puerto Rico comprises an...

.