For Wi-Fi we have terms and definitions in 3 topics. The topics are Cellular, Internet and Technology.

Wi-fi (Cellular)

Wi-Fi is short for wireless fidelity and is another name for IEEE 802.11b. It is a trade term promulgated by the Wireless Ethernet Compatibility Alliance (WECA). "Wi-Fi" is used in place of 802.11b in the same way that "Ethernet" is used in place of IEEE 802.3. Products certified as Wi-Fi by WECA are interoperable with each other even if they are from different manufacturers. A user with a Wi-Fi product can use any brand of access point with any other brand of client hardware that is built to the Wi-Fi standard.

Wi-fi (Internet)

(Wireless Fidelity)
A popular term for a form of wireless data communication, basically Wi-Fi is "Wireless Ethernet".
See also: Ethernet

Wi-fi (Technology)

Stands for "Wireless Fidelity." Products that meet a certain standard are certified as Wi-Fi. So you can use your certified Wi-Fi laptop with other Wi-Fi products (like a network card) and be sure they will work together.

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