CPC - Critical Patch Collections

What is CPC ? Is it something related to CPU (Critical Patch Update) or this is something related to RUP (RollUp Patches) ?

A Critical Patch Collection is a collection of critical patches that all R12 Financials customers must apply to ensure proper operation of their systems. More of what was called a Family Pack in 11i days.

If you follow the note to MetaLink Note: 739978.1, you’ll see that on September 26th, Oracle announced Critical Patch Collections (CPC) for the following products: Payables, Receivables, Payments, Subledger Accounting and Tax.