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: Viacom Posts Loss; Sets \$8 Bln Buyback  NEW YORK (Reuters) - Viacom Inc. on Thursday posted a  quarterly loss on charges from spinning off the Blockbuster  Inc. video rental chain, but its shares rose on a  larger-than-expected stock repurchase and higher cable network  advertising sales.

Business