# Why does USB-B exist? (computer cable)

**URL:** <https://boards.straightdope.com/t/why-does-usb-b-exist-computer-cable/1031930>\
**Category:** Factual Questions\
**Created:** [July 26, 2026, 1:01pm UTC](https://boards.straightdope.com/t/why-does-usb-b-exist-computer-cable/1031930 "2026-07-26T13:01:02Z")\
**Posts on this page:** 1\
**Showing post:** 25

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**Author:** ![robby](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/robby/32/11048_2.png) [@robby](https://boards.straightdope.com/u/robby)\
**Post date:** [July 26, 2026, 3:11pm UTC](https://boards.straightdope.com/t/why-does-usb-b-exist-computer-cable/1031930/25 "2026-07-26T15:11:37Z")

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> [@steronz](#):
>
> Does an extension cord do anything but connect 2 or 3 wires?

Right, and there is a reason that there are no legal power extension cords with male plugs at each end (aka “suicide cables”).

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