Subassemblies (like PCBs) have part numbers with 2
groups of 5
digits. The first group is the model number of the instrument that
first used that subassembly, padded with leading zeros. So for
example the CPU data path (ALU and registers) board in an
HP9830 is an 09810-66514, as it was first used in the HP9810.
-tony
Many thanks Tony, I didn't know about the "model number of the first
instrument that used the assembly minus the zeroes", this explains a lot of things!
Marc