Difference between shared memory and parcel

[wajih abdou]

I would like to know the difference between shared memory and the parcel in the Android.

I found that the Parcel are used for sharing data between process in the inter process communication (IPC) level and the shared memory contains data shared between applications. I would like to know when the shared memory and the parcel are used respectively and what kind of data are stored in each location?
There it a connection between the shared memory and the parcel?

Thanks in advancez