A new version of a software or hardware product adding new and/or updated features is designed to replace an older version of the same product. Most hardware products have to be completely replaced at full cost to obtain the new version. Most software products, however, allow you to upgrade to a new version at a reduced cost as long as you legally own a previous version. Although manufacturers are eager to have you purchase each new version, this is not always necessary. When a new version of a product appears on the market, you may want to visit the Web site of the manufacturer to read about the improvements and additional features of the new product. You may also want to read some reviews of the product before you purchase.