A user error is an error made by the human user of a complex system, usually a computer system, in interacting with it. Related terms such as PEBCAK (Problem Exists Between Chair And Keyboard), ID-10T error (idiot error), and other similar phrases are also used as slang in technical circles with derogatory meaning. A highly popularized example of this is a user mistaking their CD-ROM tray for a cup holder, or a user looking for the ‘any key.’
This usage implies a lack of computer savvy, asserting that problems arising when using a device are the fault of the user. Critics of the term argue that the problems are caused instead by a device that doesn’t take into account human limitations and is thus designed in a way that induces errors.
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The Daily Omnivore 