Captain's Ready Room
The Captain's Ready Room serves as the Commanding Officer's private office, found adjacent to the main Bridge (on a ship) or Operations Center aboard a starbase. The ready room gives the CO a quiet place to handle his/her day-to-day administrative duties without the distraction or distrubance of the activities of the bridge. It is often the preferred location to hold private conversations or conferences.
Ready Rooms are laid-out and furnished to suit each commanding officer. Typically there is a private head, a food replicator, a large desk with computer terminal, and ultra-secure communications (including holographic display). At least one viewport is also built into the design.
Both Romulan and Cardassian ships also have a similiar facility.