Thanks Dave. That's a great little book.

I have ordered the bigger version of that book , called : DESK REF. This one is not meant to be carried in the pocket, but stays on the desk. It is a combination of two books: the Pocket REF, and the Handyman. Also, it is written in a bigger font, which is necessary for my retired eyes.

Now just if I can manage to get a Casio 85v calculator, life will be perfect. It was the calculator I used at work before retiring. Colleagues got newer models but I remained faithful to this old thing. I asked my boss if I could take with me after retiring and he said OK. However, it collapsed, and the electronic guy at work told me it could not be fixed. I love that model for so many reasons , and wish I can get one these days.