Cobalt is a transition metal with the chemical symbol Co.

ABC Co. is a leading technology company.

The CO of the army unit led the troops into battle.

I am planning a trip to CO next summer.

I work for a co.

The value of the cosine function at 0 degrees is 1.

I couldn't go to the party because I had to work late.

In America, many colleges are now coed.

I have a great relationship with my co-worker.

She will co-star with him in the upcoming movie.