The kelly tool was intended specifically for opening doors and other barriers.

"And I look for high barriers to entry," meaning new competitors would have trouble penetrating the market.

It also suggests recommendations for overcoming barriers involved in research with this population.

Some residents, particularly those living near Interstate 95, have long clamored for new sound barriers.

The same is true for various barriers to entry in politics.

The term was also used by the military for barriers set up on roads specifically to prevent the passage of horses.

In fact, Congress recently passed a bill that limits Federal money for barriers on old highways.

The same contingent is fighting the park service's plan for permanent barriers around the front sidewalk and back garden.

The measure called for strong barriers between the commercial banking and securities industries.

And let some of the tax revenue from the shopping development pay for sound barriers on the Thruway.