Electronic Dance Music, or EDM, encompasses a wide range of sub-genres, each with its own unique characteristics and history. Here are some of the main genres within EDM:

1. House: One of the earliest forms of EDM, house music originated in the Chicago club scene in the early 1980s. It is characterized by a 4/4 beat, synthesized melodies, and a focus on the rhythm section.
2. Techno: Techno emerged in the mid-1980s in Detroit and is characterized by a repetitive, mechanical beat and a focus on technology and futurism. It is often considered the foundation of modern electronic music.
3. Trance: Trance is characterized by a fast tempo, repetitive beats, and a focus on melody. It originated in the early 1990s in Germany and has evolved to include many sub-genres such as progressive trance and uplifting trance.
4. Drum and Bass: Also known as DnB, this genre emerged in the early 1990s in the UK and is characterized by its fast tempo and heavy use of breakbeats. It has evolved to include sub-genres such as jungle and neurofunk.
5. Dubstep: Dubstep originated in the UK in the late 1990s and is characterized by its heavy bass and use of syncopated rhythms. It has evolved to include sub-genres such as brostep and halftime.
6. Electro House: Electro House is a fusion of house and electro, characterized by its use of distorted and modulated synth sounds, and heavy basslines.
7. Deep House: Deep House is characterized by its use of soulful and melodic elements, and a focus on atmosphere and emotion. It originated in the early 1980s in Chicago and New York City.
8. Trap: Trap is characterized by its use of Southern-style hip-hop beats, and often includes elements of EDM and dubstep. It originated in the late 1990s in the Southern United States.
9. Future Bass: Future Bass is characterized by its use of emotive chord progressions and heavy use of vocal samples. It has become popular in the 2010s, and is influenced by genres like dubstep and trap.
10. Big Room: Big Room is a sub-genre of electro house characterized by its powerful uplifting beats and energy. It is popular in the mainstream and in festivals.
11. Breakbeat: Breakbeat is a genre that originated in the UK in the late 1980s and early 1990s. It is characterized by its use of breakbeats, which are samples of drum loops from funk, soul and disco tracks.
12. Bass Music: Bass Music is a genre that encompasses many sub-genres like Dubstep, Drum & Bass, and Trap. It is characterized by its heavy use of bass and sub-bass frequencies.
13. Ambient: Ambient is a genre characterized by its focus on atmosphere and soundscapes rather than traditional musical structures. It originated in the 1970s and has been influenced by genres like minimalism and experimental music.

It’s important to note that this is not a definitive list and the world of electronic music is constantly evolving, with new sub-genres emerging all the time.