A textbook on programming, based on lectures delivered at summer school courses organized at the initiative of the NATO Scientific Committee. The book addresses a number of questions of programming theory, namely: features of sequential processes and their interaction in combining, methods of writing compilers, processing records. A separate chapter provides an overview of discrete event modeling languages. The book is original in nature and is of considerable interest to specialists in the field of programming, algorithmic languages, translators, modeling. It will be useful for students and graduate students of relevant specialties.