The book is based on lesson materials tested by the author within the walls of the Faculty of Retraining of Specialists of the St. Petersburg State Polytechnic University. The basics of working on the Internet, searching for information, and working with e-mail are covered. It describes how to communicate through Internet forums, chats, blogs and social networks (VKontakte, Odnoklassniki), conduct telephone conversations via Skype, exchange messages via Twitter, etc. Recommendations are given on the use of the Internet when solving everyday issues: booking a room in a hotel, ordering tickets, receiving government services, purchasing goods, etc. Attention is paid to entertainment and self-education: visiting online museums and libraries, learning via the Internet, watching television programs and YouTube videos, etc. Security issues when working on the Internet are considered.