Terminal (Halo 4)

The terminals in Halo 4 are Forerunner terminals accessible to the player over the course of the game's campaign. Like the terminals in Halo: Combat Evolved Anniversary, the Halo 4 terminals feature animated and voiced cinematics similar to motion comics. Fictionally, the terminals are presented as visits to the mysterious store of information known as the Domain, once used by the Forerunners.

Finding a terminal awards the player the Contact the Domain achievement, while finding all the terminals in the campaign unlocks the the Terminus achievement.

Prologue: Jul 'Mdama
The "prologue" for Halo 4's terminals is centered around Jul 'Mdama, leader of the Covenant breakaway faction, and revolves around his fleet discovering Requiem.