Hi, I have just received a photo in a used set of books that I purchased from Amazon. The return address says mylatency,,2069 Agave Way,,San Jose, Ca. 95133. I can barely read the writing on a hat that a man is wearing, I believe it says 1990 CU , however , I can't make out the rest of it. If you , or anyone you know,has sold a set of books through Amazon, I would be glad to return your picture, if you might be able to identify it. my email is email@example.com.