Australian scientist John Osara. According to a search on the science and technology website, WiFi technology was first invented by Australian scientist John O'Sullivan in 1992. At that time, he was a member of CSIRO (Commonwealth Scientific and Industrial Research Organization), a research organization located in Australia. Osala and his team are working on a wireless communication technology called OFDM (orthogonal frequency division multiplexing), which is widely used in WiFi. WiFi is a wireless communication technology used to transfer data between devices. Its full name is "Wireless Fidelity" (Wireless Fidelity), which is usually used to connect computers, smartphones, tablets and other devices to the Internet or other local area networks.