MCO = Miscellaneous Charges Order. (Basically a voucher that an airline gives you that can be used for future travel)

KK = confirming. You usually see the term 'instant KK' being used here, that means AC will pull a seat from the revenue inventory and send it off to yield management to convert it to D or W so you can have an award ticket. Benefit available exclusive to Super Elites or Elites who are willing to pay extra points.

Power by hour = AC only pays for the number of hours that they use the plane. If it's sitting on the ground, AC doesn't pay anything for it.