Techno is stuff like Jeff Mills, Richie Hawtin,Juan Atkins, Cristian Vogel, Joe Beltram. Its basically repititive intricate beats, but with a TOUCH of funkyness to it. thats why you heard the terms tech-house. its basically techno mixed in with house. Trance is stuff like Ferry Corsten, Lange, Tiesto the big cheezy sound. Progressive House, is just House with a trancy feel to it. Then there's a bunch of hybrids..there can be funky and tribal, or deep and tribal, deep and funky...bunch of shit but real Techno is more repetitive with a slight funk to it. alot of people don't understand it.