Unlike Cold War-era spies, intelligence analysts and government policymakers can no longer rely primarily on cloak-and-dagger operations to keep track of global threats. Now, like businesses and other organizations, they’re increasingly turning to the torrents of information available on the Internet and through other non-classified sources.

Booz Allen Hamilton offered a service called InTrack to help collect, monitor and process data collected from the Internet and other sources. LexisNexis promoted a system for sending automated warnings of trouble abroad. There were companies selling translation systems, Web search tools and data-mining supercomputers. One of the more popular booths was Google’s.

The Google booth displayed a high-definition video of a virtual car driving through an exact digital representation of San Francisco — streets, buildings and all. But Google exhibitors said they were not allowed to tell a reporter why the company was there or what it did for intelligence or anything else.