Oh this is my fault, i mentioned it elsewhere.
Its something i regularly refer to, im not sure how widespread the terms are used though.
Essentially:
Type I = Steady State (30 minute jog - Long distance swim - Easy row etc)
Type II = Interval Training (Sprint 100m, walk 100m - Hit heavy bag for 1 minute, rest 1 minute - Run for 2 minutes fast, jog for 3 minutes etc)