What The Differences Between ABAP and HR-ABAP

The ABAP HR is an integral part of ABAP. Generally in ABAP the following are done:

1) Table development
2) Date Processin
3) Reprt developing
4) BAPIs /RFC s
5) Data base update
6) Screens development/enhancement
7) Scripts and smart forms.
8) Function Building
9) Java connectors etc.

This is basically done through the PROGRAMMING in ABAP builder by using ABAP 4th generation languge. This may be related to any module of my SAP ERP 2004 like HR, FICO.SD,MM,CRM Etc.,
Now when it is said ABAP HR. It is the development of ABAP in the area of HR to meet the clients requirements according to the functional specifications .They may be in any area of HR like in the areas of time aspects ,pay aspects, OM aspects and Self Services like E-recruitment, ESS etc.