An article on Japanese site PCWatch writes about a briefing Microsoft gave journalists earlier this week about 64-bit products it is proposing. One 64-bit OS is conspicuous by its absence, it would appear. Microsoft has outlined, according to the article, four different types of .NET server – Web, Standard, Enterprise and Datacenter – and the article gives an interesting table describing the differences between these products. In particular, the table outlines IA-64 support, memory requirements, Numa support and also whether the products will support multiple CPUs. But Opteron support is still a mystery.