"I wouldn't turn off your spam filter, " says Paul Henry, a spokesman for the information technology security firm Secure Computing (nasdaq: SCUR - news - people ).

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While Instagram 2.0 is not a new app, it features a completely different system: new buttons added to the interface of the app allow users to see the filter in effect before snapping, shaving seconds off even the iPhone 4 experience.

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UTC's solution: Pass the return air through an aluminum filter sprayed with titanium dioxide that, hit with ultraviolet rays, sets off a chemical reaction that breaks down nasty organic compounds like benzene and formaldehyde into carbon dioxide and water.

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Instead of using senior recruiters to filter through the company's applicants, lower-level screeners process them first and only hand off the most-qualified.

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The Boston-based company, which was spun off from Expedia last year as a publicly traded company, says it has deployed technology to filter reviews and flag problematic content.

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About 300 new reviews are posted each day, he said, with staff working to filter out the malicious, the factually inaccurate, or those where the author seemed to be simply letting off steam.

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