on demand

He is used to having me on demand these days.

The decision is based usually on demand and available space.

We also value the need and ability to write on demand.

The most difficult foreign policy test is likely to center on demands from other countries to share in technology.

Now a few words on individual demands set out in the report.

Since then, the players have given in on most demands.

News on demand will join those services later in the year.

What in fact they did was to provide an educational service on demand.

More significant, though, is the impact of the global economy on demand for oil.

He did not like the idea of changing his form on demand for her, or anyone else.