My father teaching me to type PKUNZIP on files that "ended with .zip" in the DOS shell (not long before the Norton Commander kind of GUI arrived to our computer) is one of my earliest memories as a toddler: I would ask him "What does it mean?" and he would simply not know. It was 1990 and I was 3 and a half I think. When I learned what it stood for it was kind of epic, for me.