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: Zafi Slows, But Experts Urge Vigilance The Zafi.d worm seems to have done its worst, security experts said Friday, but they urged users to remain on guard through the holidays for more seasonal shenanigans.

Sci/Tech