资料来源 : Free On-Line Dictionary of Computing

Paper Feed Control Character
     
        (PFCC) An obscure mechanism used in Fortran run-time systems
        whereby the first character of a line of output to a
        line-printer caused various actions after the line was
        printed:
     
        	space	return newline
        	0	return newline return newline
        	1	form-feed
        	+	return