Air Defense Direction Center

• Joint Direction Center, a USAF ADDC collocated with an Army Air Defense Command Post, AADCP.
• *Alaskan Joint Direction Center, at 2 sites: Fire Island and Murphy Dome Air Force Station for the Alaskan Air Command Semi-Automatic Defense System
• Semi-Automatic Direction Center, an ADCC with a command, control, and coordination system that provided the Semi-Automatic Ground Environment, e.g., AN/FSQ-7 or AN/GSA-51
• *Combined Direction-Combat Center, a USAF ADDC collocated with a SAGE Combat Center
• *SCC Direction Center, a USAF ADDC to be collocated with a planned Super Combat Center in a nuclear bunker
• Manual Direction Center, an ADCC without a SAGE CCCS, successors to the Manual Air Defense Control Centers of the Permanent System
• NIKE direction center, Army Project Nike AADCPs for coordinating surface-to-air missile fire from multiple batteries, e.g., W-13DC through LA-45DC, 9 of which were within Missile Master nuclear bunkers.