In 1985, the computer society of IEEE started a project, called the project 802, to set standards to enable intercommunication among the equipment from a variety of manufacturers.Bluetooth: Bluetooth technology is the implementation of a protocol defined by the IEEE 802 IS standard, i.e. the IEEE standard protocol that defines a wireless personal area network (PAN) operable in a room is Bluetooth, that has a range of 10 meters only.Wi-Fi: Wi-Fi refers to wireless fidelity. It is a specific type of WLAN that use specifications in the 802.11 wireless protocol. Wi-Fi has a bigger range than a room, i.e. 150 feet (46 m) indoors and 300 feet (92 m) outdoors.Wireless LAN: Wireless LAN is any local area network (LAN) used by a mobile user to connect through a wireless connection.Infraded: Infra-ded is not an IEEE standard protocol.