aww, sorry, Air Transport, and High Tech Services
air transport only supplies like 3 corps. But it is the key supply for Services, and HTS. most of my AT corps make a killing, while keeping my more important HTS and Services robust. AT is an excellent corp. With a couple of disadvantages... you can't move them.
If your interested in ASQ, well, the frame work for my ASQ, is the first 7 corps i mentioned above. plus coal.
The AT supplies, Services, and HTS. And those 2 are used in almost everything. they are fairly cheap, and usually used in quantities that strong arm the final quality.
the other parts of my ASQ, machine parts for I EQ, I EQ for Oil, and allot of other thing. between, both the E-comps, and I EQ, they cover like 75% of what services, and HTS don't. the remaining stuff goes to coal.
lastly, sand, and stone, and cement, for the handful of things that are left.