![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBd-2bIW6QmnFk0gVajZZHtOr2ar-6ScQJdOxktzQqyKutHuI_5OMyeFfVMnb_7iYjGVLapkERFf0ggVm-RCPKeVyyGPFfbzHKPzlTWU6T1iLheCBL7FEHE6I1zlcVPN1eU3OH2nso654/s640/OK.jpg)
The word OK is reported to have arisen
during the American Civil War, when the armies wrote in a blackboard, at the
end of a battle day, the casualties they had suffered. It was written in the
following way: [number of people] K (K for "killed").
Therefore, OK means "0 [people]
killed", undoubtedly a synonym of a good day, or a controlled situation.