For which model of Hewlett Packard calculator do you require a manual ?

If your required manual is not listed above there is an excellent source of HP calculator information/manuals at http://www.hpcalc.org/ and also free manuals at the hewlett packard site

Another great link for older HP calculators is http://www.hpmuseum.org/ and of course you can try http://www.hp.com/calculators/