B - Basic Structure. N - Nexus. P - Build Pylon. A - Assimilator. G - Gateway. F - Forge. C - Photon Cannon. Y - Cybernetics Core. B - Shield Battery.
V - Advanced Structures. R - Robotics Facility. S - Stargate. C - Citadel of Adun. B - Robotics Support Bay. F - Fleet Beacon. T - Templar Archives. O - Observatory. A - Arbiter Tribunal.