'''Fido''' may mean:
* Fido is a Latin word meaning "I trust"
* FIDO, a fog dispersal system
* Fido is a common name for a pet dog
* Mark 24 FIDO Torpedo or Mark XXIV mine, a US acoustic homing torpedo used during the Second World War
* fido.net is an Internet Service Provider
* Fido Solutions, the Canadian wireless cellphone carrier formerly known as...(continue reading)