Many reputable platforms provide access to digital versions of textbooks and specialized scientific literature.
: A massive Russian scientific electronic library that follows the "open science" model. It offers free access to thousands of academic publications, research papers, and lecture materials.
: Historically a go-to site for students to find school textbooks for subjects like Informatics (Информатика) and ICT.
: Languages such as Python, Pascal, or C++, along with algorithmization techniques.