The term "M1" can refer to different concepts depending on the context. In economics, M1 is a measure of the money supply that includes physical currency, demand deposits, and other liquid assets. It represents the most liquid forms of money available in an economy, which can be quickly used for transactions. In technology, "M1" often refers to Apple's M1 chip, a custom silicon processor designed for their Mac computers and iPad devices. Launched in 2020, the M1 chip is known for its high performance and energy efficiency, integrating CPU, GPU, and memory into a single chip architecture.