The electronic file is a reality in medical practice nowadays. We have a decade of experience with electronic files in a neonatology unit. We use a local network that consists in one server and 8 connected computers, distributed in the hospital. Filemaker Pro® is used as database administrator and access to data is protected with passwords. Data entry is made by health care professionals in charge of the patients. Patient's reports and statistical information are based on data entered to the system. This methodology allows to have update clinical data, indexing of information, to maintain track of pharmacological indications, prescribe parenteral nutrition and obtain information for research purpose. It is possible therefore, with a minimal computing expertise, to devise electronic files that can improve the quality of health care (Rev Méd Chile 2005; 133: 241-5)