They should never have been allowed to operate such a system.

Many computer software, such as operating systems, are not without flaws.

Some international schools operate a different system using semesters rather than terms.

The companies, most of which are less than five years old, operate systems in 50 cities and serve some 300,000 subscribers.

"Last week there were over 6,000 people in town and we had to operate a queuing system."

"There are all kinds of complexities in operating a large system," he said.

Phone companies operate systems that allow customers to dial what and whom they want.

The school's structure can operate systems which either enhance or restrict the child's education.

They did not have enough money at the time to purchase the amount of equipment needed to operate a suitable system.

The difficulties have come in deciding how to operate such a system, particularly where agencies from more than one state are involved.