Handheld and Portable Computer Club

HPCC is a voluntary, independent user group for enthusiasts of handheld and portable computers and calculators, particularly Hewlett Packard models, run entirely by and for its members without commercial support. It holds in-person and online meetings, publishes the club journal Datafile, hosts conferences, and maintains an online library of articles, schematics, ROM/MOD files, and calculator documentation. The club also produces books such as RCL20 and RCL40 chronicling HP calculator history.