Calls for on-demand appointments, and particularly out-of-hours services, make this practically inevitable.
Should that loophole be closed or does the ban on product replacement apply across the range of children’s and youth programmes, including on-demand content?
As far as possible, it provides an on-demand service for repairs and fittings.
As digital broadcasting becomes more widely adopted, as one might expect more and more programming will be available in an on-demand form.
We are dealing with the prospect of on-demand broadcasting, which is linked with the new technologies which we have discussed at length.
All these elements have a cost, in that they involve the provision of extra capacity in order to cater for the "on-demand" passenger.
The future is in cable, in optical fibres arid in interactive and on-demand services, in addition to services that are supplied free to air.
A standard way of accommodating infinite objects in programming (for example, in lazy functional languages) is to use generators and on-demand evaluation.