Reduced to the bare essentials; stripped of all nonessential parts or features.
From 'bare' + 'bone,' implying a skeleton with nothing but the basic structure remaining. This phrase emerged in the 16th century, comparing stripped-down things to a body with only bones left.
In computer terminology, 'barebone' PCs are the closest you can get to a skeleton—just the chassis, motherboard, and power supply, so you build your own machine from there.
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