Editing Advanced Photo System (section)

=== Processing ===
[[File:IX240 Cartridge.jpg|thumb|right|Fujifilm APS cartridge, assigned FID code 708-759]]
After the [[film developing]] process, APS film is stored in the original cartridge, unlike 135 film. For identification, every cartridge is assigned a unique nine-digit cartridge identification (CID) code and the associated strip of APS film is assigned an identical filmstrip identification (FID) code; while the CID code has nine digits, the FID code has six human-readable digits and nine machine-readable digits.<ref name=Kodak-About/> The six-digit FID code is printed on the cartridge label, at both ends of the processed negative, and also is stored magnetically (as a nine-digit code) in the IX layer. This FID is usually printed on the index print as well as the back of every individual print.<ref name=PopPhoto-9603/>{{rp|34}} The CID/FID system was designed to be an additional convenience both for the photoprocessor, who can easily match each processed film strip and prints with its cartridge, and each cartridge to a particular customer's order, and for the consumer, who can easily locate the correct cartridge if reprints are desired.

To facilitate automatic processing of film, a unique [[DX number]] is assigned to the different types of film.

APS film is typically processed by using a small machine to transfer the exposed APS film from the original cartridge to a reloadable one, then re-attached to the original cartridge and rewound using another machine after processing. After support for APS was withdrawn in 2011, many film processors dispose of the APS cartridge and return the exposed film strip bare.

[[Image:IX240 Negative.jpg|thumb|center|upright=4|An IX240 negative strip; note printed FID (708-759) preceding first frame]]