a common bus structure for avionics and satellites as shown in fig . 1 is comprised of a module lid , module floor , module stack base , module compression bolts and stackable modules . stackable modules are sub - dividable to create module scaled chamber volumes individually as required , while stackable modules simultaneously create at least one collectively continuous raceway sealed chamber volume perpendicular to individual stackable modules in the vertical direction where no module floor is present , in order to internally electrically interconnect the contents of any stackable module with the contents of any other stackable module via internal connector raceway system . raceway sealed chamber volume therefore collectively and continuously traverses all present stackable modules positioned between module lid and module stack base . modules are interchangeable and inter - connectable in any order , and contain all required electronic or mechanical components required for cbsas to function as a single box consolidated avionics system that is equally functional in the atmosphere or the vacuum of space , while also being fully functional as a single complete stand - alone satellite system . cbsas enables a paradigm shift in the aerospace industry whereby all legacy and current multiple black - box systems on aerospace platforms such as missiles , rockets , satellites and aircraft are extremely inefficient when compared to the size , weight and power attributes of cbsas . the ability for cbsas to be instantly employable as either a single box consolidated avionics system for use within the atmosphere or in space while also being fully functional as a stand - alone satellite enables a hardware , firmware and software capability never before manifested in the aerospace industry .