intro

An introduction.

[demoscene] Introductory screen of some production.

2. A short demo, usually showing just one or two screens.

3. Small, usually 64k, 40k or 4k demo. Sizes are generally dictated by compo rules. See also dentro, demo.

The noun has 2 meanings:

Meaning #1: formally making a person known to another or to the public
  Synonyms: presentation, introduction

Meaning #2: a brief introductory passage to a piece of popular music