Prepare To Be Boarded!

I'm mighty tard (Old Hoosier for "tired") tonight, so I'm not going to say much. I was thinking of writing something about Alexei Panshin's 1968 sf novel Rite of Passage, which I just reread, but I quickly found there was more to say than I felt like saying tonight, so I'll just show you the picture above, which I suddenly remembered when I read a reference to a slide rule in Panshin's book.