As the disease progresses, the liver has a hard time filtering out toxins, which can go to the brain and cause problems such as memory lapses, trouble sleeping at night and lack of coordination.

CNN: The growing culprit behind liver disease

One part of Google is busy creating indexes of online information while at the same time filtering out "spam, " which in this context means Web sites whose only function is to make money off the fact you land on them, without providing any sort of "value-added" information in the process.

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Today, we have appliances that can run three layers of anti-virus, advanced data protection algorithms, global reputation analysis, and real-time acceptable use filtering in the network.

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"When you have people like Britney Spears and Christina Aguilera working with rappers and prominent producers, it's only a matter of time before it starts filtering down to everyone else, " he says.

BBC: NEWS | Entertainment | The rise and rise of urban music

For startups, the time to do the people filtering and fit analysis is before the hire.

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The second phase involved filtering the waste-water a third time, to bring it up to irrigation grade quality, so that it could be reused locally without upsetting anyone downwind of the plant.

FORBES: Making Rum a Green Enterprise

In a short time YouTube and its competitors will smarten up their searching and filtering capabilities.

FORBES: What's in Storage

Time and again he shows us laundresses, miners and farmhands filtering, challenging and reworking any readings of artworks which did not strike them as entirely apt.

ECONOMIST: Cultural history

We are filtering the results to show no more than two from any one source at a time.

BBC: links to other news sites