Users may find it a bit bulky to carry handily; nevertheless it remains a powerful portable system.

The portable system can spot a drone up to five miles away using electronic radar.

But whatever you're doing, you always get the feeling that it would be more at home on a portable system.

But you do not need a portable system to take advantage of the savings available when you buy tracks and albums online, rather than from a traditional retailer.

They are usually produced in large fermentation plants, but a portable system could cut transport time and cost, especially in the developing world.