Backward compatibility

The two sides supporting HD DVD and Blu-ray drive are backwards compatible. Manufacturers can decide whether to include Blu-ray/DVD/CD compatible optical head, so that it can be backwards compatible, but it would be a mistake, or not. When you look at the computer fully explaining what you want to buy, there will be the information about the drive when it is reading or writing Blu-ray/DVD/CD discs. You will see "Read: DVD±R, DVD±RW, Write: DVD±R…", etc.