Definition: In this task, you are given a news article. Your task is to classify the article to one out of the four topics 'World', 'Sports', 'Business', 'Sci/Tech' if the article's main topic is relevant to the world, sports, business, and science/technology, correspondingly. If you are not sure about the topic, choose the closest option. Note that URLs in the text have been replaced with [Link].
Input: Yahoo, SBC extend partnership, plan new services Yahoo and SBC Communications will collaborate to extend to cell phones and home entertainment devices some of the online services and content they currently provide to PC users.&lt;p&gt;ADVERTISEMENT&lt;/p&gt;&lt;p&gt;&lt;img src="[Link]" width="1" height="1" border="0"/&gt;&lt;a href="[Link]"&gt;Solaris 10(TM) OS: Position your business ten moves ahead.&lt;/a&gt;&lt;br/&gt;Solaris 10 OS has arrived and provides even more\reasons for the world's most demanding businesses\to operate on this, the leading UNIX platform.\Like the fact you can run Linux and Solaris applications\side-by-side and run the same OS on SPARC(R),\AMD Opteron(TM), and Intel processor-based systems.\Discover more reasons and how Solaris 10 OS can move\your business ahead today.&lt;/p&gt;

Sci/Tech