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Tecnologia 5cw3f

Por que os teclados não seguem a ordem alfabética? Descubra o motivo 22736e

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Você já deve ter notado: as letras no teclado do seu computador ou notebook não estão em ordem alfabética. Isso parece estranho, já que uma sequência lógica tornaria tudo mais fácil de encontrar, certo? Ou será que não?

Bom, o design dos teclados que usamos hoje não é aleatório; na verdade, tem uma história que vem de séculos atrás. Se você ficou curioso para descobrir, continue lendo, pois a seguir explicaremos o porquê disso!

Por que os teclados não seguem a ordem alfabética? h3d4l

Teclado mecânico Logitech Pop Keys. Imagem: Logitech/Divulgação.

Olhe para o teclado do seu computador ou notebook. A sequência de letras se inicia assim: Q, W, E, R, T, Y… correto? Nada de A, B, C. Mas por que ele é assim? A resposta está na história. O teclado moderno herdou esse layout de um equipamento antigo: a máquina de escrever

E o inventor americano Christopher Latham Sholes é o responsável por esse arranjo de teclas, que ficou conhecido como QWERTY. Como deu para perceber, esse nome vem da sequência de seis letras presente na primeira linha do teclado que mencionamos acima.

Retrato de Christopher Latham Sholes, um dos inventores da máquina de escrever. / Crédito: George Iles (1912), domínio público, Wikimedia Commons

O QWERTY é o layout de teclado mais comum no mundo ocidental, especialmente em países que usam o alfabeto latino, como o Brasil, os Estados Unidos e grande parte da Europa.

Mas afinal, por qual motivo Sholes desenvolveu essa nova disposição de teclas? Bem, existe uma explicação bastante popular sobre essa ordem, contudo, ela não é historicamente comprovada.

A história do QWERTY 3i2l6b

Christopher Latham Sholes desenvolveu, com a ajuda do impressor Samuel W. Soule e do mecânico amador Carlos S. Glidden, a primeira máquina de escrever comercialmente bem-sucedida: a Sholes and Glidden typewriter.

A criação começou em 1867, e em 1873 a fabricante E. Remington and Sons adquiriu a máquina e a refinou ainda mais antes de lançá-la no mercado, em 1874.

Máquina de escrever Sholes e Glidden, produzida pela E. Remington and Sons. / Crédito: Domínio público, Wikimedia Commons

O primeiro modelo da máquina de escrever de Sholes apresentava um teclado com duas fileiras de caracteres organizados em ordem alfabética. Porém, ao longo do desenvolvimento da máquina, Sholes focou em aperfeiçoar a disposição das letras.

Ele realizou várias arrumações por tentativa e erro do arranjo original das teclas alfabéticas. Acredita-se que a análise da frequência de bigramas (pares de letras) e o de operadores de telégrafo tenham motivado essas mudanças.

imagem mostra um tablet ligado e um teclado virtual que ocupa metade da tela
Teclado virtual em um tablet (Reprodução: Windows Central)

Após anos, Sholes introduziu alterações no layout, como inverter a ordem de parte do alfabeto e mover as vogais para a fileira superior, chegando a um teclado com quatro fileiras que já se aproximava do QWERTY.

Assim, quando a E. Remington and Sons comprou os direitos para fabricar a máquina de escrever, fez os ajustes finais no teclado, criando o layout praticamente igual ao QWERTY moderno que usamos hoje.

Leia também

A origem do layout QWERTY 611nx

Teclado sem fio. Imagem: Padraig Treanor/Unsplash
Teclado sem fio. Imagem: Padraig Treanor/Unsplash

Uma explicação muito difundida afirma que o layout QWERTY foi desenvolvido para evitar que as hastes metálicas das máquinas de escrever travassem ao digitar letras que aparecem juntas com frequência. Para isso, letras que formam combinações comuns no inglês, como “T” e “H”, foram posicionadas de modo que não ficassem muito próximas fisicamente. 

No entanto, essa justificativa é considerada apócrifa, ou seja, não há comprovação histórica definitiva de que esse tenha sido o verdadeiro motivo para a criação do layout QWERTY.




OLHAR DIGITAL – Link original da matéria

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