Máte chybu u WI-FI jedná se o slovní hříčku.
Viz. AJ wiki Phil Belanger, a founding member of the Wi-Fi Alliance who presided over the selection of the name "Wi-Fi", has stated that Interbrand invented Wi-Fi as a pun on the word hi-fi (high fidelity), a term for high-quality audio technology.[22]
a wiki čerpala od tud https://boingboing.net/2005/11/08/wifi-isnt-short-for.html