Microsoft is developing Big Brother-style software capable of remotely monitoring a worker's productivity, physical well-being and competence. The Times has seen a patent application filed by the company for a computer system that links workers to their computers via wireless sensors that measure their metabolisms. The system would allow managers to monitor employees' performance by measuring their heart rates, body temperatures, movements, facial expressions and blood pressure. Labor unions said they fear that employees could be dismissed on the basis of a computer's assessment of their physiological state. Technology allowing constant monitoring of workers was previously limited to pilots, firefighters...