This classic book is a systematic exposition of general topology. It is especially intended as background for modern analysis. Based on lectures given at the University of Chicago, the University of California and Tulane University, this book is intended to be a reference and a text. As a reference work, it offers a reasonably complete coverage of the area, and this has resulted in a more extended treatment than would normally be given in a course. As a text, however, the exposition in the eariler chapters proceeds at a more pedestrian pace. A preliminary chapter covers those topics requisite to the main body of work.