"In the photography world, a prominent proprietary file format
is Kodak's Photo CD (.PCD). Once the premiere format for film
scanning, it is now a difficult-to-work-around relic. Recently I
set out to resurrect some old PCD images on a Linux system--a
challenge that serves as an object lesson in the importance of open
standards in any kind of digital archive.
"For years PCD was the preferred target format for professional
photo labs scanning slides and negatives. It was the output of
high-end, all-in-one scanning systems built by Kodak, supporting
all types of film from APS size up to large-format..."