Apple's deal to acquire Siri, a mobile assistant company, isn't just about buying another iPhone app
Make no mistake: It represents Apple's entry into the search market.
In other words, Apple's war with Google continues to heat up. And this time, Apple is beginning to aim right at Google's crown jewels.
How so?
Siri is not a search engine in the same way Google is. It doesn't index the web and deliver a bunch of links and pictures and videos back.
But it represents what we think one form of effective search will look like on mobile platforms: It takes a request from you and brings back actual results.
Here's how Siri works: You talk to it with your voice and it answers questions or makes recommendations.
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Source -Business Insider