The software must be used carefully, and backed up by experience.

There are now 17,500 British troops, backed up by 13,000 police officers.

Army units backed up by air support assaulted the island, and about 3,000 people died.

But even the systems backed up by paper have problems.

The five had me backed up against a wall by this time.

"We just have a sense of caution, which is more psychological rather than backed up by hard data."

Laws were made for using direct rule on a colony, backed up by military power.

Germany was not yet militarily strong enough to back up such a venture by force.

News for the 1990s backed up by 60 years of authoritative reporting.

"Good intentions have to backed up with action, by the Government and everyone else."