A new system was developed for filing all the endoscopic images generated in our hospital. The system is composed of an on-line network for analog images supplied from the endoscopy stations and stored on 300 mm optical disks, on the one hand, and an off-line PACS for digital images recorded on a 130 mm magneto-optical disk (MOD) at each endoscopy station, on the other. For close examination of the images digital images are displayed from the MOD on a high-resolution computer graphic monitor, and for quick review of a large number of images, analog images are retrieved from the 300-mm optical disks. This system has been in clinical use at our university hospital for the past year and has proven useful for education of endoscopy, for the quality control of the endoscopy practice, and for the management of the patients.