the.com/keycap

The tiny hat on every key, taking all the fingerprints so the switch doesn't have to.

means The removable plastic (or sometimes metal) cap that fits over a keyboard switch, printed with a letter, number, or symbol so your finger knows where to land.

from A straightforward 20th-century compound of 'key' (from Old English 'cæg', originally a tool for locking/unlocking) and 'cap' (from Old English 'cæppe', a covering for the head, ultimately from Latin 'cappa'). As mechanical typewriters gave way to computer keyboards, the two-piece key — a switch underneath, a labeled cap on top — needed a name, and English just stacked the obvious words together, the way it does with 'hubcap' and 'kneecap'.

origin
Cherry MX shape became the de facto industry standard
material war
ABS shines and fades; PBT stays matte and outlasts it
profile obsession
SA, OEM, Cherry profiles sculpt height for your fingers' comfort
hobby economy
collectors pay more for keycaps than the keyboard itself
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