Introduction

Introduction could refer to:

• Introduction (essay) - opening section of a piece of literature.
• Introduction (music) - opening section of a piece of music.
• In the demoscene, an intro is a short demo with only few screens. They are often small, due to competition rules.
• As a title or description of a work, the introduction indicates the work covers the basics needed to reference or understand the more detailed treatments of the topic covered elsewhere.