Folk etymology: "O.K." (aka "okay") originated with US President Teddy Roosevelt, when his staff would inquire to him "How's everything today?", he would reply "Just like at Old Kinderhook." Old Kinderhook was a camp that he had attended during his childhood with great memories. After a while, it was abbreviated and became the buzzword regarding the status of everything at the Oval Office when things were good or running smoothly.