This is a mathematics book for people who use modern computing tools in their fields of electricity and electronics. The text draws on common sense and experience rather than formal mathematical theorems and linear development of mathematically correct presentations. It does not just convert a traditional text book to the use of a calculator or computer but actually restructures what is presented so that the student can use the power of the new calculating machines more effectively. The book assumes that the instructor has available computational capability such as a PC that can be used to manage the teaching environment. The students should have available calculating capabilities sufficient to do the class problems and homework. It is not necessary that all students have the same computing machine.