Basic principles and Intro

Intro and basic principles are semantically related in introduction topic. In some cases you can use "Intro" instead a noun phrase "Basic principles", when it comes to topics like something new.

Intro noun - A short section (as of a book) that leads to or explains the main part.

Basic principles and intro are semantically related in introduction topic. Sometimes you can use "Basic principles" instead a noun "Intro", if it concerns topics such as something new.