Is Ko opposite of OK?

Is Ko opposite of OK? In everyday language, KO means “tired, exhausted” as others have stated. However, it is used a lot in IT to express the contrary of OK for example for the passing or failure of tests, the completion of a task and so on.

In everyday language, KO means “tired, exhausted” as others have stated. However, it is used a lot in IT to express the contrary of OK for example for the passing or failure of tests, the completion of a task and so on.