There are a number of ways you can choose to index your microfiche images after scanning. Some systems use sequential numbering or other basic numeric references that can be captured along with the corresponding image. Many jackets contain jacket labels which can also be extracted via OCR. CAR jackets ( computer aided retrieval) are generally given a unique reference number using a grid pattern to locate its position in the jacket. All of this information can be captured and added as metadata on an image, making it possible to instantly retrieve your file with a simple text based search.