The most commonly used keyboard layout is the QWERTY layout. Named after the first six letters in the top row of the keyboard, it was designed in the 19th century for typewriters to reduce jamming by spacing out commonly used letter pairs. Despite the introduction of alternative layouts like Dvorak, QWERTY remains popular worldwide due to its widespread adoption and familiarity. It has become the standard layout for most English-language keyboards and is used in various devices, including computers and smartphones, contributing to its pervasive presence in typing and computing.