The short course of lectures offered contains educational material, including familiarity with Internet technologies, languages ​ ​ for creating Internet applications and web documents, tools for creating computer network applications, a universal language for working with Office applications. The textbook will help systematize the knowledge gained in lectures and practical classes, perform off-audit independent work, prepare for current and intermediate control. The publication is addressed to students of secondary specialized educational institutions, as well as to everyone interested in this topic.