There are a vast amount of individual electrical connector types that can be differentiated in a number of ways, namely by level, function, and termination.
Connector Level
Each connector type can fit into one (or more) of five categories, referred to as levels in industry. These were defined by various companies under the support of the National Electrical Distributors Association (NEDA).
• Wire-to-board or subassembly-to-subassembly level
• Box-to-box or input/output level
• IC chip or chip-to-package level
• IC package or package-to-board level
• PC board-to-board level
