Last week, the Department of Homeland Security said that foreign hackers broke into hundreds of supposedly secure computer networks belonging to U.S. electric utility companies. Hackers accessed the control rooms and had the power to potentially cause nationwide blackouts.

Computer Crash: Some Solutions
Over the years, amazing developments in computer design and software have created a myth of security around the computer. Most Las Vegas computer systems actually have serious vulnerabilities. The experience of a computer failure of some kind is common; the best way to handle it is to be prepared.