There is some very exciting work going on today to rethink the design of offices, even for people who remain in the office full-time. For them, and for telecommuters and other mobile workers, we are recognizing that everyone does not need his or her own private, assigned desk or office all the time. Concepts such as "non-territorial" and "free-address" offices, or "hoteling", are becoming quite popular. The benefits are clear: better space utilization, lower costs, and offices that are designed more for team work than for individual desk work. Changes like these have to be made carefully, and must be based on careful analysis of tasks, workflow, technology, and organizational culture.