Wow!! A slide rule. I had to use one back in the early 70's in Tech school studing electroincs. The first one was made of plastic and you had to be careful not to leave it in the hot sun of your car. I did up grade to a "Pickit" (I think) made of metal. I still have it and I do not know why ! Well yeah I do, it cost me $70 dollars and I was only making about $1.45 an hour at a service station back then. Thanks for Sharing !!
