The History And Origins Of Our Pc Computer Keyboards
Below is a MRR and PLR article in category Computers Technology -> subcategory Web Development.
The History and Evolution of PC Keyboards
Introduction
The keyboard is one of the most overlooked yet essential components of our daily computing experience. We often use specific keys out of habit, rarely considering the historical journey that shaped our current keyboard layout.
Early Development
The standard PC keyboard didn’t appear overnight; it evolved through three key IBM projects, each marked by both innovation and challenges. The IBM Enhanced 101 Key Keyboard, introduced in 1987, became the standard, following two earlier designs.
The IBM PC and XT Keyboards
The original IBM PC and XT keyboards featured 83 keys. Function keys were positioned on the left, with a combined number and cursor pad on the right. Keys like Ctrl, Left Shift, and Alt were aligned horizontally with the function keys. Other notable features included:
- The Escape (Esc) key was positioned to the left of the number row.
- A unique asterisk () key allowed for easy typing of .* without complex combinations.
- A Backslash/Vertical bar key was situated between the tiny Left Shift and the Z key.
- The narrow vertical Enter key was challenging for users to hit accurately.
Despite its oddities, this layout combined sensible and impractical elements, leaving a lasting impact on keyboard design.
The Original AT Keyboard
IBM’s next project was the AT keyboard, incompatible with its predecessor but adaptable through reprogramming. It retained the function keys on the left but moved the Esc and unshifted asterisk to the number pad. Changes included:
- An L-shaped Enter key.
- A reduced-width Backslash key took the place of part of the Backspace key.
The Enhanced Model
Market demands led to the Enhanced model, compatible with the AT but with a radically new design:
- Function keys and the Esc key were repositioned along the top.
- The number pad shifted rightward.
- A new cursor pad, split into two key sets, featured four arrow keys arranged in an inverted T, and six additional keys: Insert, Delete, Home, End, Page Up, and Page Down.
This redesign caused confusion, with users mistakenly hitting the Delete key instead of End, resulting in data loss. As user feedback poured in, IBM made adjustments, including:
- Restoring the Backspace key’s original size.
- Relocating the Caps Lock key.
- Adding twin Ctrl and Alt keys flanking the spacebar.
Legacy and Impact
Despite initial challenges, this layout became the industry standard. Today, we rarely question why keys are arranged as they are, but we owe much to the designers’ meticulous efforts.
The keyboard remains a crucial, albeit underappreciated, component of modern computing, a testament to the thoughtful engineering of early IBM designers.
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