Ergonomic keyboards address wrist pronation, ulnar deviation, and finger stretching that cause discomfort during extended typing sessions. Split keyboards like the Kinesis Advantage360 and Ergodox EZ separate the left and right halves, allowing users to position each hand at shoulder width. Ortholinear layouts like the Planck arrange keys in a grid rather than staggered rows, reducing finger reach distance. Contoured keyboards like the Kinesis Advantage2 use a bowl-shaped keywell that positions keys at varying heights to match finger lengths. While the learning curve is steep (2-6 weeks for full proficiency), ergonomic keyboards can significantly reduce RSI symptoms for heavy typists.