I tried to open one, and it wouldn't let me, but after a few clever tricks, I did it.
DLLs consist entirely of little diary entries. Mostly little poems the Windows machine is thinking about. Sometimes musings about the various people who use the computers. Sometimes quick written processing through everyday fears and hopes.
Mostly little poems. They're quite charming.
But I felt guilty about accidentally nosing into the computer's DLLs.