...postprocessor,
The dvips program developed by T. Rokicki has full psfig support; it is available via anonymous FTP from labrea.stanford.edu. OzTeX also supports psfig and is available from various ftp sites. Psfig is available from whitechapel.media.mit.edu.

...comment'.
See `Appendix J: PostScript File Structuring Conventions' in The PostScript Language Reference Manual

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