trying to note psp region codes for umd's

[MarioMasta64]

im trying to figure out psp region codes for umd's heres what i got currently

ones im unsure about
# UCED? UCJS? UCJX? ULED? ULJP? ULUX? XDUS?
ones i think i know but could use more info on
# [UCET] First Party Pre-Production?
# [ULET] Third Party Pre-Production?
# [UMDT] Internal Disk
whats the difference between these two?
# [UTAV] TestDisk?
# [UTST] TestDisk?
ones im 95% sure on
# [ULAS] First Party Asia
# [ULES] First Party Europe
# [ULJB] First Party Demo Disc? Unused?
# [ULJM] First Party Japan
# [ULJS] First Party Japan Sample Disc?
# [ULKS] First Party Korea
# [ULUS] First Party America
# [UCUS] Third Party Asia
# [UCES] Third Party Europe
# [UCJB] Third Party Demo Disc?
# [UCJM] Third Party Japan
# [UCJS] Third Party Japan Sample Disc?
# [UCKS] First Party Korea
# [UCUS] Third Party America