DLF, India's largest listed property developer, is implementing Wi-Fi across all its buildings in the country.Wi-Fi is an acronym for "wireless fidelity", and is a set of standards for wireless local area networks.All the occupants and visitors to DLF properties will be able to access Internet at high speeds anywhere within the premises developed by DLF, a company release said today.The Wi-Fi services would be provided by O-Zone networks, a wireless broadband provider.DLF officials said it is the first realty company in India to implement the technology.