This is an original HP-15C Owners Handbook from Hewlett Packard. It is a vintage manual that has never been opened, still sealed in its original packaging. The manual is in English and was printed in the United States. It is a user manual for the HP-15C computer and includes all the necessary information to operate the machine. The brand of the manual is HP and it falls under the category of Computers/Tablets & Networking, Vintage Computing, and Vintage Manuals & Merchandise. This manual is a great addition to any vintage computing collection.