operational *
in operation
operating

Which is going to make a real difference in operations here.

The western part of the line is still in operation.

"And how soon do you think we might hope to have such a school in operation?"

The company is expected to be in operation by the end of the year.

The school was in operation by the summer of 1940.

Open the case and minutes later you are in operation.

The police national computer has been in operation since 1974.

So far, without a project in operation, they have spent about $120 million.

Then, the plan could be put in operation some other time.

The system was still in full operation as of 2011.