There's a lot of sub genres in electronica. The term 'techno' has been warped to include all electronic music due to mainstream media being ignorant. Techno doesn't include trance, house, vocals or any of the more modern sub-genres. The correct term is electronica. You have:
drum & bass
etc, as sub-genres.
"techno" is just a broader sub-genre of electronica that was pioneered in Detroit, derived from synth pop and electro.
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