Connectors

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[ 334417 ] = Electronic connector manufacturing – Coaxial connectors manufacturing; Connectors, electronic (e.g., coaxial,cylindrical, printed circuit, rack and panel); Cylindrical connectors, electronic, manufacturing; Fiber optic connectors manufacturing; Planar cable connectors manufacturing; Rack and panel connectors manufacturing

[ 334419 ] = Other electronic component manufacturing — Computer cable (e.g., monitor, printer) manufacturing

[ 335931 ] = Current-carrying wiring device manufacturing — Ground Fault Circuit Interrupters (GFCI) manufacturing; Sockets, electric, manufacturing; Solderless connectors (electric wiring devices) manufacturing; Switches for electrical wiring (e.g., pressure, push-button, snap, tumbler) manufacturing; Terminals and connectors for electrical devices manufacturing

Every device that is physically or mechanically attached to another device uses some kind of connector.  Data cables, power cables, telecommunications cables, printer cables, monitor cables … the list is extensive. 

It might be said that wireless devices use a form of virtual connector — the wireless protocol that passes through the atmosphere and links together the various components.

There are many companies making connectors and many others that sell them to other manufacturers, computer assembly companies, and to individual consumers.  In the future, there may be special connectors to link together devices designed only for use in home networks. These network-specific connectors might have special pin assignments for capabilities such as monitoring by intelligent computers, unique low-voltage connections for use with specialized uninterruptible power supplies (UPSs), and a network system bus that automatically links everything in the home network. 

Devices linked via wireless means might also need these same capabilities, so they would not be entirely “wireless”.