Professional Engineers Ontario (PEO), up to 1993 known as the Association of Professional Engineers of Ontario (APEO),[1] is the self-regulatory body that governs Ontario's 85,000 professional engineers, and sets standards for and regulates engineering practice in the province. It has a statutory mandate under the Professional Engineers Act of Ontario to protect the public interest where engineering is concerned.[2] It was created in 1922[3] and is mandated to educating its members to latest developments and maintaining a Code of Ethics that puts the public interest first. Licensed professional engineers can be identified by the P.Eng. after their names.