Mac Publishing, LLC, publishes an independent Macintosh publication and Web sites. Its publication is MacWorld Magazine, which is a specialty magazine aimed at Mac users and the computer industry. Mac Publishing sites include: Macworld.com - which provides in-depth, lab-tested product reviews, help and how-to advice for Macintosh products., Macworld PriceFinder - a pricing tool that allows users to check current prices and availability of Macintosh products from a variety of online resellers; and MacCentral.com - a resource for Mac-related news on the Web. Headquartered in San Francisco, Mac Publishing was a joint venture between Ziff-Davis Media and International Data Group. MacWorld Magazine has been in publication since 1984. As of 10/10/2001, Mac Publishing, L.L.C. is a subsidiary of International Data Group.