What is the difference between the American Board of Dermatology (ABD) and the American Academy of Dermatology (AAD)?

What is the difference between the American Board of Dermatology (ABD) and the American Academy of Dermatology (AAD)?

The American Board of Dermatology (ABD) is an autonomous body that acts as the certifying agency for the specialty of dermatology - overseeing initial and continuing certification in dermatology and its 3 subspecialties (dermatopathology, pediatric dermatology and micrographic dermatologic surgery).

The American Academy of Dermatology (AAD) is the largest national professional society for the specialty of dermatology. Its purposes are to educate dermatologists and the public, and to represent the specialty on issues concerning other professional organizations, the public, industry, and the government. Membership in the AAD is not limited to Board certified dermatologists, but includes other dermatologists, other physicians and health care providers from all over the world who have an interest in the field of dermatology. 

For more information, see What is the difference between the ABD and the AAD?