Technology's biggest names have rushed to disclose the number of law-enforcement requests for data they receive, a result of allegations that they have provided the National Security Agency "direct access" to customer data on their servers.

The accusations center on the NSA's Prism program, which was revealed by former security contractor Edward Snowden in a June interview with The Guardian. Snowden told the newspaper that Verizon, the largest U.S. wireless carrier, had given the NSA blanket access to phone records. The next day, The Guardian and Washington Post reported that a government PowerPoint presentation showed the NSA was "tapping directly into the central servers of nine leading U.S. Internet companies" -- Apple (AAPL), Microsoft, Yahoo (