Electronic devices packaged on wing boards

A system comprising:

• a system board having a plurality of signal interface segments;
• and
• a plurality of interchangeable three-dimensionally (3-D) scalable modules, each of the scalable modules including:
• a planar signal interface to parallelly couple to a signal interface segment of the signal interface segments of the system board,
• a base board that retains the planar signal interface,
• a wing board,
• an electronic device packaged on the wing board, and
• a flexible circuit being a flexible linkage between the base board and the wing board, the flexible circuit having a signal path to communicatively couple the electronic device and the planar signal interface,
• wherein at least some of the scalable modules have different numbers of planar signal interfaces to removably couple to different numbers of the signal interface segments.