This category will list companies that manufacture and/or distribute ferrite cores used for induction components magnetic powders and component of magnetic powers and permanent magnets.

This category will list companies that manufacture and distribute coils and inductors that are used as stand alone components or as components of assemblies such as relays, solenoids etc.

This category will list manufacturers and companies that support the manufacture of magnetic heads.

This category will list manufacturers, suppliers, distributors, repairers and renters of tools and equipment used within the Electronics and Electrical industry including companies that provide services to these companies. It is not for raw materials or industrial supplies, these should be submitted to the "Materials and Supplies" category.

This category will list companies that manufacture and distribute transformers except the transformers used in power transmission and distribution systems (high power and high voltage) which are listed at Business/Industries/Electronics_and_Electrical/Substation_and_Transmission