over the years, claimed by their designers and users to be more efficient, intuitive, and ergonomic. Nevertheless, none have seen widespread adoption, partly due to the sheer dominance of available keyboards and training. Although some studies have suggested that some of these may allow for faster typing speeds, many other studies have failed to do so, and many of the studies claiming improved typing speeds were severely methodologically flawed or deliberately biased, such as the studies administered by August Dvorak himself before and after World War II. Economists Stan Liebowitz and Stephen Margolis have noted that rigorous studies are inconclusive as to whether they actually offer any real benefits, and some studies on keyboard layout have suggested that, for a skilled typist, layout is largely irrelevanteven randomized and alphabetical keyboards allow for similar typing speeds to QWERTY and Dvorak keyboardsand that switching costs always outweigh the benefits of further training with a keyboard layout a person has already learned. The most widely used such alternative is the Dvorak keyboard layout; another alternative is Colemak, which is based partly on QWERTY and is claimed to be easier for an existing QWERTY typist to learn while offering several supposed optimisations. Most modern computer operating systems support these and other alternative mappings with appropriate special mode settings, with some modern operating systems allowing the user to map their keyboard in any way they like, but few keyboards are made with keys labeled according to any other standard. Comparison to other keyboard input systems Comparisons have been made between Dvorak, Colemak, QWERTY, and other keyboard input systems, namely stenotype or its electronic implementations. However, stenotype is a fundamentally different system, which relies on phonetics and simultaneous key presses or chords. Although Shorthand (or 'stenography') has long been known as a faster and more accurate typing system, adoption has been limited, possibly due to the historically high cost of equipment, steeper initial learning curve, and low awareness of the benefits within primary education and in the general public. The first typed shorthand machines appeared around 1830, with English versions gaining popularity in the early 1900s. Modern electronic stenotype machines or programs produce output in written language, which provides an experience similar to other keyboard setups that immediately produce legible work. Half QWERTY A half QWERTY keyboard is a combination of an alpha-numeric keypad and a QWERTY keypad, designed for mobile phones. In a half QWERTY