It was a short way of writing a different spelling of the words all correct. Some foreign-born people wrote all correct as o-l-l k-o-r-r-e-c-t, and used the letters O.K.

VOA: special.2010.02.28

we are going to return from exile in the 530s, o.k.?) So when we talk about the post-exilic period, we are talking about the period after the return.

我们将会回到530年左右的流放时期，好吧）,当我们说到流放后时期，我们就的是回归后的时期。

耶鲁公开课 - 旧约导论课程节选

This actually I think derives from a Greek word, "Synkope, " S-y-n-k-o-p-e, synkope.

这个术语我觉得来源于希腊语,Synkope,S-y-n-k-o-p-e

耶鲁公开课 - 聆听音乐课程节选

"That's kind of fun!" "What's your name?" "Broklin,B-R-O-K-L-I-N."

VOA: special.2010.04.30

No problem. Got to go.I'm double-parked. O.K. Thanks.

VOA: standard.other