The first step to achieve all the benefits of an electronic medical record is accurate entry of clinical data. Most existing technologies for data entry by clinicians have significant disadvantages. The digital pen and paper system is a new technology which may be the most suitable documentation device for hospital nurses. In this study, usability testing was used to evaluate whether the digital pen and paper system would be usable for hospital nurses. This study was conducted in the labor and delivery unit of an urbane academic medical center.