| AUSTIN-ROPER | VELOCÍPEDO | USA | WHINTHROP - MASSACHUSETTS | 1896 |
| AUSTRAL (Melbourne) | MOTOCICLETA | AUSTRALIA | MELBOURNE - VICTORIA | 1895 |
| AUSTRAL (Sydney) | MOTOCICLETA | AUSTRALIA | SYDNEY - NEW SOUTH WALES | 1910 |
| AUSTRALIS (Leichhardt) | MOTOR | AUSTRALIA | LEICHHARDT - NEW SOUTH WALES | 1897 |
| AUSTRIA (Trautmannsdorf) | MOTOCICLETA | AUSTRIA | TRAUTMANNSDORF AN DER LEITHA - NIEDERÖSTERREICH | 1930 |
| AUSTRIA (Wien) | MOTOR AUXILIAR | I.AUSTRO-HÚNGARO | WIEN - WIEN | 1903 |
| AUSTRIA-ALPHA | MOTOCICLETA | AUSTRIA | WIEN - WIEN | 1933 - 1950 |
| AUSTRO-JLO | MOTOCICLETA | AUSTRIA | WIEN - WIEN | 1938 |
| AUSTRO-MOTORETTE (Graz) | MOTOCICLETA | AUSTRIA | GRAZ - STEIERMARK | 1924 |
| AUSTRO-OMEGA | MOTOCICLETA | AUSTRIA | KORNEUBURG - NIEDERÖSTERREICH | 1932 |
| AUTECO | MOTOCICLETA | COLOMBIA | MEDELLÍN - ANTIOQUIA | 1941-1961 |
| AUTINAG | MOTOCICLETA | ALEMANIA (REP. WEIMAR) | DÜSSELDORF - WESTFALEN | 1924 |
| AUTINO | TRICICLO | ALEMANIA | BAD SÄCKINGEN - BADEN | 1947 |
| AUTISA | MOTOCICLETA | ESPAÑA | LES FRANQUESES del VALLÈS - BARCELONA | 1980 |
| AUTO FOUR | MOTOR | USA | CHICAGO - ILLINOIS | 1971 |
| AUTO LUX | MOTOCARRO | ITALIA | MILANO - MILANO | 1937 |
| AUTO MIRAGE | TRICAR | ITALIA | RASTIGNANO-PIANORO - BOLOGNA | 1974 |
| AUTO MOTO (Coriano) | TRICAR | ITALIA | - RIMINI | 1978 |
| AUTO REPAIRS | MOTOCICLETA | REINO UNIDO | COVENTRY - WARWICKSHIRE | 1911 |
| AUTO SCOOT | ESCÚTER | USA | CHICAGO - ILLINOIS | 1938 |