From V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016) :
HPPA
Hewlett Packard Precision Architecture (HP, RISC)
From The Free On-line Dictionary of Computing (30 December 2018) :
Hewlett Packard Precision Architecture
HP-PA
(HP-PA) Hewlett Packard's range of RISC processors.
[Details?]
(1995-02-22)