Yavin Briefing room
Briefing room were pilots were briefed before the attack on the Death Star. The tactical battle plans carried by R2 D2 led to a weakness in the death star which the Rebel pilots could explot.
Yavin War room
The war room displayed how close the Death Star was to Yavin. When the Death Star was in range of the moon Yavin it could fire its superlaser to destroy the Rebel base.
Behind the centre display were the flight display charts mapping the flight routes of the pilots spaceships and any incoming enemy fighters. Behind them are the communication crew keeping track on the pilots.