I use to work on hospital lab software.
* It was over 20 years old by the time I started
* It was written in Fortran
* Variable names were single and double digits
* Each fortran program would run in isolation but had a shared memory process
* It was formally a terminal program but a weird Java frontend was created so everything looked like Windows GUI
* All program names were four letter acronyms
* All data was stored in fixed width binary "flat" files
* It previously was under CVS version control, but each install slowly drifted apart, so each site had it own unique features and bugs.
* I once had to move a significant feature from one install to another using only patch files generated from the work done on the original install.
* It was over 20 years old by the time I started
* It was written in Fortran
* Variable names were single and double digits
* Each fortran program would run in isolation but had a shared memory process
* It was formally a terminal program but a weird Java frontend was created so everything looked like Windows GUI
* All program names were four letter acronyms
* All data was stored in fixed width binary "flat" files
* It previously was under CVS version control, but each install slowly drifted apart, so each site had it own unique features and bugs.
* I once had to move a significant feature from one install to another using only patch files generated from the work done on the original install.