They have already endured a series of disappointments as the mobile operating system ran into obstacles under its creator, Palm, and then under its acquirer, HP.

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But what of the tax system and the structural obstacles to employment that come with it?

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The "quick drop" system was supposed to remove one of the main obstacles to the adoption of electric vehicles, namely the several hours it takes to recharge a flat battery.

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Another especially important consideration for SUVs, according to Shenhar, is accident avoidance, including the effectiveness of the braking system, how nimbly the vehicle can be steered around obstacles in an abrupt lane-change maneuver, and how secure and forgiving the handling is.

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This assistance system gives the driver a visual and acoustic warning of recognized obstacles, prepares him for braking action and assists him with the braking process as the situation requires.

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While the merger will have to overcome several political obstacles, it is a sign that the Greek banking system begins to respond to the economic crisis, and a vote of confidence by foreign investors that can become the model for other Greek and European banks.

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However, substantial obstacles to equal educational opportunity still remain in America's educational system.

WHITEHOUSE: The White House

But removing obstacles to work will require significant reforms to the housing-benefit system.

ECONOMIST: Welfare reform

Enthusiasm over the Vita has been held in check by the aforementioned obstacles, but I think LittleBigPlanet may be a tipping point for the system.

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