# What is the difference between a USB port and a USB receptacle?

The Wikipedia article USB hardware states:

Standard connectors

• The type-A plug. This plug has an elongated rectangular cross-section, inserts into a type-A receptacle on a downstream port on a USB host or hub, and carries both power and data. Captive cables on USB devices, such as keyboards or mice, terminate with a type-A plug.
• The type-B plug: This plug has a near square cross-section with the top exterior corners beveled and inserts into a type-B receptacle on an upstream port on a USB device, such as a printer. On some devices, the type-B receptacle has no data connections, being used solely for accepting power from the upstream device. This two-connector-type scheme (A/B) prevents a user from accidentally creating a loop.
• Receptacle is socket, or female connector. Port is the connection point (which could be plug or socket, male or female connector). – Puffafish Sep 30 '20 at 7:59
• @Puffafish What do you mean by the connection point? Why plug or receptacle, isn’t it always plug and receptacle (since you cannot connect two plugs or two receptacles)? – Maggyero Sep 30 '20 at 10:34

• housing means enclosure or shell – jsotola Sep 27 '20 at 17:41