You're right, ASD is a mistake as this is an ophthalmology board. ASD can stand for American Society of Dermatology as well as Anchorage School District.
On one board, the geography game has the most posts. One posts a place name and a description and another person posts a place using the last letter of the previous post.
The US capital and also a name for a state. Both are famous for its apples. Washington state produces apples. Washington, whom D.C., is named after, chopped down a cherry or apple tree (depending on the source of information).