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suggests the most relaxed typing position is one in which the keyboard user's forearms are parallel to the ground, with wrists held straight. To facilitate this posture, Klockenberg published a study in 1926 that suggested the primary key clusters for two-handed typists should be split into left and right halves which are set at an angle to each other, allowing the wrists to remain straight. A more detailed study was published in 1972 by Kroemer, suggesting that an adjustable split keyboard may reduce user pain. During the 1970s, several studies

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