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In the Automatic Microfilm Information System (AMFIS), it is assumed that one knows what document he is seeking and what its call number is AMFIS is a fast system of retrieving documents--but only in the physical sense, not in the sense of literature 'searching.' Regardless of how he determines the great volume of documents he must inspect, the researcher today must have immediate access to these documents. AMFIS provides just that. Indeed, access to any one of several million documents is now possible in a matter of seconds with a minimum of physical effort. Furthermore, it is actually possible with this system not merely to edit groups of microfilm frames but also to physically delete or add within seconds single frames or groups of frames of microfilm. This ability to edit with ease makes AMFIS an open system as contrasted to closed systems, such as microfilm reels or the Rapid Selector.