BC and AD are abbreviations for before Christ and Anno Domino mean before the Christ's birth after the Christ's birth
Standard DVDs. 1  Region 1: U.S., U.S. Territories, Canada, and Bermuda. 2  Region 2: Japan, Europe (excluding Russia, Belarus and Ukraine), Greenland, South Africa, Swaziland, Lesotho, Egypt and the Middle East. 3  Region 3: Southeast Asia, South Korea, Taiwan, Hong Kong and Macau.
As with DVDs, Blu-ray discs also have region coding. Although there are only three Blu-ray regions, the restrictions on what can be played where work in roughly the same way. This means it's important to check before buying a disc while abroad or from the internet that it will work on your player.