Oh, I remember those slide projectors. I didn't realize they were still in use today. With all the modern technology, I find it interesting that some people still use a slide projector.
I remember going through slides, holding them up to the light to figure out what they were, and putting them in the slide projector trays.
Sometimes I would get them in upside down and you would have to take them out and insert them the right way.
There were other times when the carousel would get stuck or it would randomly skip a couple of slots.
Many years ago a slide projector was a great way to give a presentation or an easy way to view slide pictures.
Now I like to make slide presentations using PowerPoint on my computer. I find this a much easier way to put together something like this.