Most workers are well aware that every keystroke they make on work-issued computers, phones and PDAs can be monitored legally by their employers. But many do not know of the legal debate raging in courtrooms across the country about the degree to which an employer can also monitor electronic activity on personal devices, even where those devices may never have been connected to the employer's network. Heather Egan Sussman, Stephen D. Erf and Lisa Richards Rahilly, all from the law firm of McDermott Will & Emery LLP, explain the legal framework for this privacy debate and what it means for the workplace, and include practical advice about when and to what extent employers can use employees' electronic activities to make employment-related decisions like hiring and firing.