Introduction The $\Delta$-theorem Some field theory over the Steenrod Algebra The integral closure theorem and the unstable part The inseparable closure The embedding theorem I Noetherianess, the embedding theorem II and Turkish delights The Galois embedding theorem, the little imbedding theorem and a bit more The big imbedding theorem, Thom classes, Turkish delights II and reverse Landweber-Stong conjecture Technical stuff References.