Serial numbers if you want to download older versions of Adobe Flash Pro for Windows from Internet Archive (ripped from AnimateArchive).
Flash 1: 536A-0434-F732
Flash 5: FLW500-03143-77238-80660
Flash MX: FLW600-59739-97340-25714
Flash MX 2004: FLD700-59705-99286-82099
Flash 8: WPD800-59139-91232-15201
Flash CS3: 1302-1228-9929-9293-9779-3300
Flash CS4: 1302-1074-1822-6453-8891-3672
Flash CS5: 1302-1194-4375-5059-8090-0288
Flash CS5.5: 1302-1934-3533-5298-5428-4418
CrimsonKero
Some of these are not valid serial numbers (CS5.5 doesn't work anymore)