Unidentified HP-41 PACs

[SilverGreen93]

Hi,
I just bought a HP-41CV that came with 3 PACs, described below, but I cannot find any information on 2 of them.
The first I think is the Financial Decisions PAC, but correct me if i'm wrong.

1. FINANCIAL I
It presents itself on catalog 2 as FINANCE 1C
Number: HP 00041 - 14003
What does 1C mean? Are there more PACs in the series?

2. MOA/ERP
Number: 82500B-A27
(c) 1982 CAT US
ID 13/14 SETDO736
Listing: MOA, MCB, NAME, MC81, CT, ERP, LL, ERP1, ERP2, ER, L*, L-, L12, AC, COR, ER1

3. PKSH
Number: 82500B-A03
(c) 1982 CAT
ID 11/12 SETD0705
Listing: PKSH, DUM1, DUM5, DUM3, DUM2, DUM6, DUM4, NAME, L*, L-,

Can anyone at least help identifying what the acronyms mean?

Thanks,
Mihai