HP C is Hewlett-Packard's version of the C programming language that
is implemented on HP 9000 workstations and servers. HP C/HP-UX is
highly compatible with the C compiler implemented on the HP 9000
Series 300/400 and CCS/C, Corporate Computer Systems C compiler for
the HP 3000. Some system and hardware-specific differences do exist.
These are documented in the HP C Reference Manual for your system.
Also, see Chapter 2, “Storage and Alignment Comparisons,” on page 5
for system-specific information.