[citation][nom]proffessorclick[/nom]when will people realise that all regular keyboards are mechanical..unless you using some sort of touch surface that is[/citation]
wat
The "Mechanical" refers to a mechanical switch, be it designed by IBM (Buckling Spring Switch) Cherry (Cherry MX) or Topre (Topre Capacitive Switches), et al.
Basically a Mechanical keyboard is any keyboard that has a mechanical keyswitch design, or, when used in layman's conversation, any keyboard that doesn't use a digitizer or simple rubber dome membrane.
If you really want to get nitpicky about the definition of "mechanical" then my cell phone is mechanical because it flips open and has electronic parts, but as the term is used amongst enthusiasts, no, not every "regular keyboard" is mechanical.