Last month, LIME looked at the benefits of several ergonomic computer mice and similar devices. Today, we look at their constant companions—keyboards—which despite being attached to some rather speedy late-model technology, remain as antiquated as a Model T.

Few realize that today’s keyboards date to the 1860s and the first modern typewriter. They haven’t changed much since, and what’s more, the QWERTY layout (named for the top row of keys) was inefficient by design right from the start, with common letters moved to the fringes to keep fast-fingered typists from jamming their machines. As many know all too well, the keyboard’s unforgiving straight-lined design requires awkward hand placement. For some, this means pain in the wrists, hands, arms, and upper body.

Clicking the average computer mouse can lead to pain in the wrists, hands, arms, and anywhere in the upper body, a condition commonly known as Repetitive Strain Injury . RSI affects nerves and soft tissue such as muscles and tendons. Ignore it at your peril—untreated, it can cause chronic pain, decreased range of motion, and permanent nerve damage.