The HP-9915A was the embedded version of the HP-85. When Hewlett-Packard released the HP-85B, the HP-9915B was also released. The HP-9915A is binary compatible with the HP-85 and all its peripherals.
This page will be expanded to include additional information about the HP-9915.
**UPDATE** This manual may be found in the HP Computer Museum site, http://hpmuseum.net/document.php?hwfile=853.