DEC-10 Macro, as a work-study undergrad, 1977. Wrote a pseudo device driver so the U administration’s COBOL monstrosity could continue unpatched to read Southern New England Telephone magtapes as if they were still coming in as punchcards. For all I know they’re still running it…
SCIENCE SCOUTS 
AAA insurance. Wrote a program which allowed insurance agents to directly input their client’s data.
DEC-10 Macro, as a work-study undergrad, 1977. Wrote a pseudo device driver so the U administration’s COBOL monstrosity could continue unpatched to read Southern New England Telephone magtapes as if they were still coming in as punchcards. For all I know they’re still running it…