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: Mozilla Released Thunderbird 1.0 The Mozilla Foundation (www.mozilla.org), a non-profit organization dedicated to preserving choice and promoting innovation on the Internet, today announced the worldwide availability of the Mozilla Thunderbird 1.0 email client.

Sci/Tech