PTX(VI)                     10/15/73                      PTX(VI)


     ptx -  permuted index


     ptx [ -t ] input [ output ]


     Ptx generates a permuted  index  from  file  input  on  file

     output.    It   has   three   phases:  the  first  does  the

     permutation, generating one line  for  each  keyword  in  an

     input  line.   The  keyword  is  rotated  to the front.  The

     permuted file is then sorted.  Finally the sorted lines  are

     rotated so the keyword comes at the middle of the page.

     Input  should  be  edited  to  remove  useless  lines.   The

     following  words  are  suppressed:   `a', `an', `and', `as',

     `is', `for', `of', `on', `or', `the', `to', `up'.

     The optional argument -t causes ptx to  prepare  its  output

     for the phototypesetter.

     The index for this manual was generated using ptx.