The Detroit Electronic Music Archive (DEMA) is a place where people can find out about the history of electronic music in Detroit. It's a kind of online library that has videos, photographs, articles, and other information about the music and musicians that make up the Detroit electronic music scene. DEMA also has a big collection of electronic music from Detroit artists, so you can also listen to it there too. The archive helps to document and preserve the history of electronic music in the city, so people can learn about it and keep it alive.