In 2003, President Bush said he wanted most Americans' medical records to be computerized within 10 years. Five years later, only a third of Texas physicians surveyed by the Texas Medical Association are using an electronic medical record system, up from 27% in 2005. Some physicians worry any system they buy may be incompatible with those used at other physician offices or hospitals, eliminating much of the benefit of having records that can be easily shared. But other medical professionals say they can't imagine working without an electronic record system.