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.
Almost all commercial DVDs that are sold have what is called a region code (also called regional code), which only allows the DVD to be played on DVD players that have this region code, and the only DVD players that typically do have this region code are those sold in that same region.