QWERTY Keyboard

A QWERTY keyboard is the dominant Latin-script keyboard layout, named for the first six letters on the top row, originally designed for mechanical typewriters and carried forward into computers and mobile devices. On mobile handsets, QWERTY has appeared in both hardware form (slide-out or thumb-board keyboards as on the BlackBerry) and on-screen form (touchscreen virtual keyboards). Accessibility considerations include key size and spacing (too small for users with tremors or low vision), reliance on modifier keys to enter numbers or symbols (a well-documented barrier for older adults and users with cognitive disabilities), and compatibility with alternative input methods such as speech-to-text, switch scanning, or external assistive keyboards. Alternative layouts such as Dvorak or Colemak, and specialised accessibility layouts (single-finger, one-hand, Braille input) offer different trade-offs.