PC World - The next time you choose an emoticon to spice up a comment about a company, product or service online, know this: There's a chance that a software program is capturing the sentiment expressed by your smiley or frowny for analysis.
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PC World - The next time you choose an emoticon to spice up a comment about a company, product or service online, know this: There's a chance that a software program is capturing the sentiment expressed by your smiley or frowny for analysis.
Source