Kodak Advantix T500 Owner's Manual page 8

Film Status Indicator (FSI)
A highlighted indicator advances from one
symbol to another to identify the status of
the film inside the cassette.
Look for this logo to be certain that the film you buy is
made for this camera.
Look for this logo to select a certified photofinishing
service for developing your film and to assure that you
get all the features of the Advanced Photo System.
PROCESSED NEGATIVES
UNEXPOSED
PARTIALLY
EXPOSED
FULLY
EXPOSED
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