For me the lightbulb went off in college with NIS and NFS when I realized the network expects me to tell it my user name so I can mount my home directory. Bef

For me the lightbulb went off in college with NIS and NFS when I realized the network expects me to tell it my user name so I can mount my home directory. Before that point I thought of these systems as well designed, unhackable things - after all, they had real multitasking right? Not like the dinky DOS machines I grew up with. But after that point the veil was lifted. And the older/more legacy a system was the worse it was.