There are two formulas or equations named after Danish-American radio engineer Harald T. Friis
Formula One | Formula Two | Superleague Formula | Formula racing | Formula Libre | Formula Ford | Formula 3000 | 2006 Formula One season | Formula BMW | Formula Three | Formula Atlantic | British Formula Three Championship | Benetton Formula | Formula 5000 | quadratic formula | Formula V6 Asia | Formula Super Vee | Formula D | Cayley's formula | 2011 FIA Formula 3 International Trophy season | 1982 European Formula Two season | Mercedes-Benz in Formula One | List of Formula One World Drivers' Champions | Formula Vee | Formula One World Championship | Formula One Teams Association | formula | Eurocup Formula Renault 2.0 | 1987 International Formula 3000 season | 1985 International Formula 3000 season |