Control panel

Control Panels were holographic displays located throughout many locales in Installation 04. The panels were used to display and input information and to control machinery such as lifts.

Design
The panels consisted of a Forerunner holotank which when activated would display one panel (in lifts) or two (for blast doors). The holograms displayed data and controls.

Even though the Covenant and the Master Chief could easily manipulate the panels, United Nations Space Command forces sometimes would use spoofers in order to override the security measures which locked certain doors.

Trivia

 * These are prominently encountered for the first time in Halo: Combat Evolved during the game's fifth level Assault on the Control Room.
 * The player must activate these to open blast doors and operate lifts.
 * A lift similar to those in Assault on the Control Room (albeit larger than these) is encountered in the sixth level 343 Guilty Spark (level).