There are three types of bikes:

1. Road bikes. Sub categories are:
a. Race bikes with race geometry, no compromises.
b. Tour bikes, support for fenders and racks, more relaxed geo.
c. Performance bikes, almost like a race bike, but more upright position, still has good lay-down-the-power geo.

2. Mountain bikes, sub cats are
a. No sus (yeah I know these dont exist, but these are MY categories)
b. Front sus
c. Full sus

3. Other bikes, sub cats are:
a. mishmash of everything else, hybrid, commuter, flat bar, bull bar. It seems to me every marketing person is looking for the next new niche (pronounced: neesh, and not, nich).