By the mid-1950s, the company was the largest British operator to be in private hands.

S7 is one of the largest private operators in Russia.

And the company is not the only large operator of nursing homes to have had problems in recent years.

Many of them have already sold out to larger cable operators.

It is the first and largest cellular operator in the country.

This was a difficult week for Edison, by far the nation's largest commercial operator of public schools.

Southwest is the world's largest operator of the Boeing 737.

The effort is the second by the country's largest operator of book superstores to take itself public.

Both are among the nation's largest operators of regional discount stores.

At the same time, the industry gained numbers of small, medium and large cable operators who realized its potential.