I understand the difference between the 3 main types of consulting: strategy, business, IT. I am now trying to further segment the market, where would you position program and project management consulting? Is it part of business consulting or it's horizontal to all the 3 main consulting types? Is there any on-line, free stuff I can read on sub-segments of consulting (I know quite a bit already on IT consulting but not very much on bus. and strategy). Thanks