A cheaper form of racing was just down the pike.

"But in terms of long life, they may well turn out to be the cheapest form of power known."

Using new and cheap forms of information technology to enhance the '"learning experience" sounds an excellent idea.

Sports were a cheap form of entertainment and further contributed to their expansion in American society.

Yet this was a cheap (and green) form of professional development.

This is a very cheap and effective form of advertising.

They are not the cheapest form of public transportation for the locals, however.

This was the cheapest form of post provided to the Indian people to date and proved a huge success.

Trains are the cheapest and most used form of transport.

The cheapest form of read/write memory in wide use today is the hard disk.