The purpose of this text is to introduce the student to the most primitive actions of a computer and then show how the primitive actions of a computer and then show how the primitive actions can be put together to construct most of the complex actions that computers regularly perform. This text takes the student through an introductory treatment of Turing machines, into machine and assembly languages, number representation, and elementary programming. Data structures and input/output programs are the major concerns of the central portion of the text, and the concluding chapter develops techniques for analysis of programs through examples of algorithms for searching and sorting.