When the UFO batch utilities such as IOXMAINT or OXFORMAT are used to extract or print PAINT panels, the output shows the 8 character panel name appended with 'P000' and may also show 'P001' and 'P002'.
PAINT panels are stored in the IOX dataspace file named PNTPNL with a key length of 12 characters.
The first 8 characters are the user defined panel name and the next 4 characters comprise the suffix assigned when the panel is created or modified by PAINT.
The first record written to file PNTPNL for a panel is given 'P000'.
If the panel is large enough to require additional records in file PNTPNL, the additional records are assigned 'P001' then 'P002'.
UFO documentation can be found in the CA Broadcom Bookshelves and PDFs