PLUM keyboard

The purpose of the product is to teach non-typists how to type, not to encourage Qwerty users to switch.

Also, the Tab and Backspace keys are centrally located within the array of letters, as are the comma and period.

Although usable for text entry by a touch-typist experienced with the PLUM layout, they are unpopular with programmers who make extensive use of shift for non-letter characters.

It is debatable whether this layout reduces repetitive strain injury, but the general consensus[citation needed] is that while it might prolong it slightly, the QWERTY keyboard might simply aggravate pains without causing the disease, and studies have shown that typists are not any more likely to develop RSI than normal people.

A user of a PLUM keyboard has claimed that using it resulted in less wrist pain than other layouts.