From a friend just getting back into hardware: "I'm wanting to catalog a large collection of chips that my Dad had so I know what I have... 7400 chips are easy to find / grab the datasheets for... Others I'm having issues as it appears manufacturer's have used the same number various times; often times locating on the web is a problem even finding the number... Major question is : 1) Is there a list of somewhere that I can use to identify the chip manufacturer's logo? Some of these chips are from the 70's. " I'm not a "vintage IC" knowledgable person, but I would be happy to pass on any links provided. I also asked him to snap some pics of ICs, and maybe folks here could point him to relevant datasheets for some of them. Jim -- Jim Brain brain at jbrain.com www.jbrain.com