Get a shedload of chemicals and trays and stuff,
take the exposed film out of your camera and ... er...
start developing!

At least, that's what I think you do, if it's anything different
I'm sure I'll be corrected. ;)

George Gee

I think you'll find some more helpful responses in your other posts of same
topic elsewhere.  Best just to ask in one location - that way everyone can
see what has been offered as help and can elaborate on those comments, and
you only have to go to one place to see all the answers.

Besides, George Gee has limited his response to (presumably) the photography
world and has neglected such developers as land developers, housing
developers, real estate developers and of course - Software Developers.