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: PRODUCT REVIEW: a 'Cold' Soldering Iron (AP) AP - If you're looking for a good holiday gift for a tinkerer you can hardly give away anything more inventive than the Cold Heat soldering iron. It redesigns something that's been virtually unchanged for decades and does so by combining high-school level science and cheap materials.

Sci/Tech