OMG, I haven't seen one of those since I was in High Scool (and I am not a young man)!
I used to read Creative Computing magazine when it was in the since digit issue numbers. I remember the S100 based systems and SS50 based systems that were common before the PET and the TRS-80 Model 1 were introduced.
Its scary to remember how psyched I was that already assembled computers were going to be available to the general public. I remember telling everyione that one day everyone would have one, but I couldn't for the life of me come up with the reason why.
Damn things have evolved. What could you do with the PET? Play Star Trek?