So, the QWERTY keyboard was engineered to slow users down and prevent jamming.
But . . . the Dvorak keyboard, designed in the 1930s and still marketed decades later as an ergonomic alternative to QWERTY, is even now thought to be a more efficient design which can enable users to double their typing speeds.
Yet poor Dvorak never really took off. Many people resisted the change: some because they felt they would lose their specialised knowledge; others fearing production costs and that the learning curve would be too great for people to warm to Dvorak quickly.