Daily Archives October 10, 2018

It’s a Magical World

I’ll let you in on a little secret. I’m writing this post on a computer. No, that’s not the secret. The secret is, I really have no idea how it does what it does. I know that when I press a key on my keyboard, a letter appears on the screen. And it’s always the right letter, unless I pressed the wrong key.

Image by Monkey Business Images. Used by permission. (That’s not me, by the way.)

I roll the trackball around with my thumb and the pointer zips across the screen. I know there are sensors that detect the reflections of the laser lights shining on the trackball to reveal its movement, and somehow, what they detect gets translated into commands to move the pointer. But how?

My smartphone takes still and video pictures, helps me keep track of my expenses, tells me the time and the ...

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