Gee wilikers Ben, do all of your posts need to be full of pictures?
Show and tell was my favorite class so yes.
I have a slide that I keep on my desk. My TEOTWAWKI of choice is an EMP so use it infrequently to make sure I remember how to use it. The instructions suggested using a graphite pencil on the slides to make it easier to move the slide.
Yes, I still have the instructions. But I now need a magnifying glass to read them... old eyes.
While I did use ball point pens in school (remember the old Bic pens that would explode in your pocket? Do I have to justify wearing a pocket protector?) I did start with a fountain pen before going with ball point. I do have pens, a collection of nibs, and ink.
I use them when I was trying to learn to read and write Biblical Hebrew.
Now back to the topic of technical books. We have a library that includes as many technical books as I can gobble up. The Princess works for a large library system and makes a point to attend book sales.
A few of those shelves are filled with math science engineering and technical.
That's enough for now. The Princess wants me to drop everything and do something.
Ben