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: Sun unleashes Solaris 10 Sun on Monday will deliver its much anticipated Solaris 10, declaring the OS now free to download for commercial use, along with an aggressive services and support plan clearly devised to undercut Linux archrival Red Hats pricing.

Sci/Tech