early HP Calculator documentation

An acquaintance sent me the following, asking if I was interested. I've no knowledge of the HP calculator community but suspect it exists. Are these of any interest to anyone: https://picasaweb.google.com/11463908000 from his email: "There are loads of documents, manuals, and newsletters. Personal Programmer Club (PPC) is the most comprehensive... goes from ~ 1/78 thru 7/86. Has PPC Conference notes and special documents. Also, Fourth Dimension 83 - 85, CHHU Chronicles 10/84 - 2/86, and HP journal 1/83 - 5/86 Loads of HP subsystem manuals. Some chip hardware. Etc., etc,. etc...." If interested, reply off list and I'll provide contact info I've dealt with this individual before and have had no issues with 2 fairly large vintage equipment transactions Steve Shumaker