> an ancient Mainframe "QQLIF file" which is still in use today! I work in the travel industry, I was recently looking at a system's documentation with includ

> an ancient Mainframe "QQLIF file" which is still in use today! I work in the travel industry, I was recently looking at a system's documentation with included revision tracking going back to the 1980s. System does the same thing it did in the 80s (presumably with completely different hardware/software)