These are temporary containers for mailing, and are returned to CTS by the unit libraries and departments. It is generally not a good idea to attach a barcode to a floppy disk, since it could cause the disk to get stuck in the disk drive. The barcode can be attached to the permanent container for the disk. Some unit libraries want the barcode attached directly to the disk. See the instructions for the individual unit libraries.
Floppy disks come in two sizes.
Alternatively, write the call number on the label attached by the publisher, if there is enough space. If a barcode is attached to a floppy disk, attach it in the label area . Write the call number on a self-adhesive label and then attach it to the disk, or remove the disk from the paper sleeve and write on the sleeve. Use book call number. Do not barcode floppy disk.