In the age of universal computerization, this volume of the encyclopedia tells about computers. Thanks to whose efforts today we own an amazing device called COMPUTER, without which modern life is simply unthinkable? How is a modern computer and how to handle it correctly? The reader will find detailed answers to these and similar questions on the pages of the volume. Written in clear and simple language, richly and vividly illustrated, this book should become a reference for every teenager who wants to master the basic techniques of working on a personal computer. It will teach you how to cope with the difficulties and configure the computer "for yourself" in such a way that it becomes an indispensable assistant in learning and finding information, communicating with friends and entertainment. After all, the possibilities of a modern computer are truly limitless .. Addressed to middle-aged and older students, teachers of schools and universities, as well as everyone who is interested in this topic .