ps2pdf converts the PostScript file input.ps to the Adobe Portable Document Format (PDF) in output.pdf. ps2pdf uses gs(1). See /usr/local/lib/ghostscript/M.N/doc/use.doc for more details, where M.N is the Ghostscript version number.
Currently ps2pdf does a reasonable job on filled/stroked graphics, on bitmap images, and on text in the 14 built-in PDF fonts in the intersection of Windows and ISO Latin-1 encodings. It converts all other text in the PostScript file to bitmaps in the PDF file (although it does only write the bitmap for each character once per page, and only on pages where the character is actually used). It does not compress the output at all, except for character bitmaps: it can't use LZW because of Unisys' patent claims, and it doesn't yet use other compression methods for images.
L. Peter Deutsch <ghost@aladdin.com>