pdf_pdf: Converts a bunch of pdf files to other pdf files. This may seem redundant, but it was done because the original pdf creator I used was pretty inefficient in file sizes. So, I dump it out to ps and then encode it back to pdf, which decreased the file sizes by about 50%. It takes an argument of a list of files. Simple usage is pdf_pdf *.pdf. png_pdf: Converts a bunch of png files to pdf files. This was done because I had a pile of scanned in bits that I wanted to convert to pdf's for distribution. It takes an argument of a list of files. Simple usage is png_pdf *.png. ps_pdf: Converts a bunch of ps files to pdf files. This was done because I had a pile of printouts saved in mozilla that I wanted to convert to pdf's for storage. It takes an argument of a list of files. Simple usage is ps_pdf *.ps<. wpd_sxw: Converts a bunch of wpd files to sxw files. This was done because I had a pile of documents done in WordPerfect some years ago that I wanted to convert to sxw for revision and printout. It takes an argument of a list of files. Simple usage is wpd_sxw *.wpd.