The History of the Computer Keyboard
The history of the modern computer keyboard begins with a direct inheritance from the invention of the typewriter. It was Christopher Latham Sholes who, in 1868, patented the first practical modern typewriter. Soon after, in 1877, the Remington Company began mass marketing the first typewriters. After a series of technological developments, the typewriter gradually evolved into the standard computer keyboard your fingers know so well today.
The QWERTY Keyboard
There are several legends around the development of the QWERTY keyboard layout, which was patented by Sholes and his partner James Densmore in 1878. The most compelling explanation is that Sholes developed the layout to overcome the physical limitations of mechanical technology at the time. Early typists pressed a key which would, in turn, push a metal hammer that rose up in an arc, striking an inked ribbon to make a mark on a paper before returning to its original position. Separating common pairs of letters minimized the jamming of the mechanism.
As machine technology improved, other keyboard layouts were invented that claimed to be more efficient, including as the Dvorak keyboard patented in 1936. Although there are dedicated Dvorak users today, they remain a tiny minority compared to those who continue to use the original QWERTY layout, which remains the most popular keyboard layout on devices of many types throughout the English-speaking world. QWERTY’s current acceptance has been attributed to the layout being “efficient enough” and “familiar enough” to hinder the commercial viability of competitors.
Early Breakthroughs
One of the first breakthroughs in keyboard technology was the invention of the teletype machine. Also referred to as the teleprinter, the technology has been around since the mid-1800s and was improved by inventors such as Royal Earl House, David Edward Hughes, Emile Baudot, Donald Murray, Charles L. Krum, Edward Kleinschmidt, and Frederick G. Creed. But it was thanks to the efforts of Charles Krum between 1907 and 1910 that the teletype system became practical for everyday users.
In the 1930s, new keyboard models were introduced that combined the input and printing technology of typewriters with the communications technology of the telegraph. Punch-card systems were also combined with typewriters to create what were known as keypunches. These systems became the basis of early adding machines (early calculators), which were hugely commercially successful. By 1931, IBM had registered more than $1 million in adding machine sales.
Electronic Impulses and Hand-Held Devices
Early computer keyboards were based either on teletype machines or keypunches but there was a problem: having so many electro-mechanical steps necessary to transmit data between the keyboard and the computer slowed things down considerably. With VDT technology and electric keyboards, the keys could now send electronic impulses directly to the computer and save time. By the late 1970s and early 1980s, all computers used electronic keyboards and VDTs.
In the 1990s, handheld devices that introduced mobile computing became available to consumers. The first of handheld devices was the HP95LX, released in 1991 by Hewlett-Packard. It had a hinged clamshell format that was small enough to fit in the hand. Although not yet classified as such, the HP95LX was the first of the Personal Data Assistants (PDA). It had a small QWERTY keyboard for text entry, although touch typing was practically impossible due to its small size.
