An ETERNALLY mislabeled genre of music which has nothing to do with Moby, Tiesto, Chemical Brothers, or Fatboy Slim. Techno is indeed a broad sub-genre of electronic dance music (or EDM, what many people use "techno" inproperly as a blanket term for) which fulfills these following constituents:
1. It is in some form minimalist, whether in composition or in sequencing.
2. It is created for the sole purpose of making people dance.
3. It is constructed in a manner to allow DJs to quickly and expertly mix and layer 2 or more of these compositions simultaneously.
Due to it's building-block nature, true techno is closer to hip-hop than many of the genres (such as trance and breakbeat) which it is erroneously associated with.
"Many argue that the works of Jeff Mills are techno in it's purest form, but others disagree."