1, oi: In computer science, oi stands for "Olympic Informatics", that is, the Informatics Olympic Competition. In the financial field, OI may stand for "OpenInterest", that is, the number of open contracts in futures or options contracts.

M3: In economics, M3 represents a definition of money supply, including M2 (cash, demand deposits and savings deposits), large time deposits, institutional money market funds and short-term national debt. In the automotive field, M3 is a model of BMW's high-performance cars.