evidently unobvious

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This side up — Finally

Submitted by gwolf on Sat, 11/20/2010 - 23:38

Can I count myself in a majority of people that feel that, while the USB standard is a great advance regarding the way we used to connect our stuff to the computer some years ago (when we used a different cable for every friggin' device we had, and we had to care about having only one parallel and two seral ports in regular configurations, and don't even get me started on port settings — speed, parity, etc.), every time we hold a USB cable in our hand we feel one of the designer teams decided to play a prank on humanity by making the connector's orientation basically unguessable?

By the frustration this square thingy inflinges on us (being any other decent cable used on a computer either have a visually recognizable shape or just round and thus omnidirectional) I think that the rate by which I get the connector with the correct side up (or front, or right, or whatever) is way lower than 50%.

Anyway, I found that the standard does provide for a (IMO quite dubious but still better than guesswork at the port) way to distinguish which way up - Quoting from Wikipedia's entry on USB connectors:

(…)The side of the connector on a USB cable or other product with the "USB Icon" (trident logo) should be "visible" to the user during the mating process.(…)

Officially, the USB 2.0 specification states that the required USB Icon is to be "embossed" ("engraved" on the accompanying diagram) on the "topside" of the USB plug, which "provides easy user recognition and facilitates alignment during the mating process."

There are several caveats which make this less than ideal, some of which you already thought of, some others are in the referred article and I won't reproduce them. I am just amazed that... USB has been around for almost 15 years (and has been the most popular connection type for ~10 years). And I have never seen anybody apparently knowing this rule.

This was a public service announcement in the hopes you will be happier people armed with its knowledge.

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