Well, who doesn't use a calculator these days? I've even seen people pull out their phones to add 2 + 2. Ha ha ha. In fact, some people are doing word searches to prevent Alzheimer's. Last night, while writing this post, I had the idea to spend some free time solving the physics problems in my old book, which you can see in the thumbnail. You know, exercising my brain. Maybe I'll dust off my old calculus textbooks from college.