From: Katie
Email: katie@wass.net
You can find them on ebay from time-to-time, but they go for a lot of money. Your best bet is to buy the CD ROM set with all scans of virtually all the older HP calculator manuals (including the 15C) on it. Here's a link to that: http://www.hpmuseum.org/cd/cddesc.htm
[arch3/_private/calc1_aftr.htm]