The PasRo book contains fundamentals of robot programming and the design concepts of the PasRO robot programming system. It describes the PasRo implementation in Pascal and C and serves as the "Language Reference Manual"for PasRo. In addition to the desription of data structures, geometric operations and robot functions, the book includes a number of sample programs. This simplifies considerably the reader[s theoretical and practical entry into a new field of computer science: robot programming.