In this volume I present some examples of line integrals, cf. also Calculus 2b, Functions of Several Variables. Since my aim also has been to demonstrate some solution strategy I have as far as possible structured the examples according to the following form A Awareness, . a short description of what is the problem. D Decision, . a reflection over what should be done with the problem. I Implementation, . where all the calculations are made. C Control, . a test of the result. This is an ideal form of a general procedure of solution. It can be used in any situation and it is not linked to.