2d graphics of crandashes in a transparent frosted glass on a plain gray background2d graphics of crandashes in a transparent frosted glass on a plain gray background
Formulas in chalk on a blackboard in the form of abstractionFormulas in chalk on a blackboard in the form of abstraction
Image of an open book with a key hanging over the bookImage of an open book with a key hanging over the book
То, что образовалось из чего-н.. Обучение, просвещение. Совокупность знаний, полученных специальным обучением.