Unknown" Aim Id (An Aim Id Which Is Not Specified Above) - Datalogic Magellan 3450VSi Product Reference Manual

"Unknown" AIM ID (an AIM ID which is not specified above)

If a label is received that does not have an AIM ID as specified above, and the
first three label characters qualify as follows...
• The first character is a ']'
• The second character is a capital or small letter
• The third character is a digit
...then the label type is set to GENERIC_DATA and the "unknown" AIM ID is left-
appended to the beginning of the label data.
Product Reference Guide
AIM Formats
339