Difference between MRS & DIS, PCRS & PCIS

1. What is the differences between Informatica Data Quality (IDQ) and PowerCenter, are both Informatica products used for integration services? Which one will be used by most of the organizations?

2. Are the Model Repository service and Data Integration Service are only related to IDQ product?

3. What it is about the Powercenter Repository service and Powercenter Integration service then, are these related to the PowerCenter product?

Note: Please look at the abbreviations below

MRS - Model Repository Service
DIS - Data Integration Service
PCRS - PowerCenter Repository Service
PCIS - PowerCenter Integration Service