Some tunes we often overlook in video games are the intro themes of publishing/developing companies, and the boot-up themes to various systems. Here is a medley of system boot-ups and company themes that can be recognized by gamers everywhere, and have special importance to me.
Composer — Various
In order of appearance:
Sony PlayStation 1
Sony PlayStation 2
Sony PlayStation 3 (before firmware 3.00)
Sony PlayStation Portable (system and game boot-up)