If you don't see what you want for your machine, check out the free IJG
source code described in the next section.  Assuming you have a C compiler
and at least a little knowledge of compiling C programs, you should be able
to prepare JPEG conversion programs from the source code.  You'll also need
a viewer program.  If your display is 8 bits or less, any GIF viewer will do
fine; if you have a display with more color capability, try to find a viewer
that can read Targa, BMP, or PPM 24-bit image files.