M1

US The amount of cash in circulation plus the amount in bank accounts.

Mathematics, Sciences The number two, as the first Mersenne prime.

Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences Apple M1, a system on a chip designed by Apple which was introduced in 2020.

Engineering, Firearms, Government, Military, Natural sciences, Physical sciences, Politics, Tools, War, Weaponry A semi-automatic rifle that was the service rifle of the U.S. Army during World War II and the Korean War.