All FITSIO subroutine names begin with the letters 'ft' to distinguish them from other subroutines and are 5 or 6 characters long. Users should not name their own subroutines beginning with 'ft' to avoid conflicts. (The SPP interface routines all begin with 'fs'). Subroutines which read or get information from the FITS file have names beginning with 'ftg...'. Subroutines which write or put information into the FITS file have names beginning with 'ftp...'.