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A keyboard with a flat-or even negative-slope is ergonomically ideal, but such keyboards are not common. That is, straight and level,” said Alan Hedge, professor and director of Cornell University’s Human Factors and Ergonomics Research Group at the time of our interview. “To minimize the risk of injury and to optimize performance, it is important that a keyboard can be used with the hand in its most neutral position. But using a keyboard in that position causes wrist extension.

Most keyboards are angled upward from front to back, and some have little feet to angle the keyboard even further.

Typing comfort: A keyboard should have full-size, well-spaced keys that feel satisfying and responsive, not cheap or mushy.

But a keyboard shouldn’t be so small that the keys feel cramped and uncomfortable to type on. Smaller keyboards also take up less room on a desk and are more portable.

Most people don’t use the built-in number pad on wide keyboards-and you can get a separate number pad for number-intensive tasks-but if you do need a built-in number pad, we also have recommendations for that.

Size: In most cases, we recommend keyboards without number pads because wide keyboards force you to place your mouse farther from your body, which can put strain on your shoulders, neck, and back.