"Then when people knock at a location," he said, "our software compares the new signal with the stored signal."

Ariba's software, for instance, can help corporate spending managers analyze a supplier's performance and compare notes with others in the company on new suppliers.

The software compares the pitches, beats and dynamics of any tune played into a mobile phone.

The software can also compare the actual allocation to the investor's target allocation.

The next time the person's signs in, the software will compare the biometrics of the new signature with the stored composite to verify its authenticity.

The site's software compares the cost of the drug at a local pharmacy to Aetna's own mail-order service.

The laptop's software compares the worker's movements with a database of risk profiles from more than 400 industrial jobs.

The software takes a new tune and compares it with the mathematical signatures of the last 30 years of Top 40 hits.

The software can also compare much data of this type to determine the amino-acid sequence.

The software recognizes pixel changes in the video image and compares the proximity of the change to other game objects to play the game.