According to an American Management Association report, 78 percent of major U.S. firms record and review employee communications and activities, including phone calls, e-mail, Internet activity, and computer files (this number is double what it was in 1997). Twenty-two percent of the companies that engage in these activities don't tell their employees they are doing so. While the 78 percent of companies that monitor employees may be a surprising number to many folks, what should be of bigger interest is the 22 percent of companies that do not notify employees of corporate monitoring.