"Let's use this bill to make the physical barriers to disabled access a thing of the past, " he said.

BBC: NEWS | Entertainment | Theatres 'face disability action'

International conventions are an essential tool for protecting marine biodiversity, given the lack of physical barriers in the ocean to confine species to a single zone.

UNESCO: Open Access to Scientific Information

What didn't fail, at last report, was the series of physical barriers in the form of steel and concrete that keep radioactive materials from being freely released into the environment.

WSJ: Nuclear Industry Likely to Reassess Safety Systems

On 1 October, the Disability Discrimination Act will be enforced in full, which means the physical barriers will have to be removed to allow reasonable access to public buildings for all.

BBC: NEWS | UK | Wales | North West Wales | Mirror view for lobster babies

It will join the other work being done to identify and remediate social, cultural, physical and legal barriers to uplift from poverty.

FORBES: Fresh $150 Million Into Development Economics

It began when Americans no longer saw their own disabilities as a barrier to their success, and set out to tear down the physical and social barriers that were.

WHITEHOUSE: 20th Anniversary of the Americans with Disabilities Act

Among companies we've surveyed, fully half of all interactions are constrained by one of five barriers: physical, technical, social or cultural, contextual and temporal.

FORBES: Boosting The Productivity Of Knowledge Workers

"The Autodesk family of 123D products breaks down barriers between the physical and digital, empowering users to customize the world around them, " said Samir Hanna, vice president, Consumer Products, Autodesk.

ENGADGET: Autodesk launches 123D Catch for iPad, lets you turn pics into 3D models

One of these barriers is conventional touchscreens, which do not offer the tactile sensation of pressing a physical button.

ENGADGET: Fujitsu, Orange partner on senior-friendly Stylistic S01 smartphone