What is SAP SP stack

Hi Expertise,
           I need your guidance in understanding the concept and difference between
           sap support package and sap sp stack. I know the concept of the sap support 
           package and applying it to  SAP R/3 but I am confused with sap sp stack in
           Netweaver.
           Please kindly clarify
Thanks & Regards
Satya207

Hi Ventaka
If you have R3 4.7 for example, you will have several compononts like BASIS, ABA and SAP_APPL and more. As you probably know there are support packages for each of these components. A SP Stack defineds a certain level of all your components. For example 4.7 SP Stack level 28 has BASIS/ABA packages up to 62 and SAP Appl packages up to 28.
A SP Stack does also include the SAP Kernel for your platform with a given patch level and a SAPGUI patchlevel. So a SP Stack is a bundle of all components in your system.
The philosophie is to apply a SP Stack to keep all your components and their dependances in sync.
<a href="http://service.sap.com/sp-stacks">http://service.sap.com/sp-stacks</a>
Regards Michael

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