1. the internal level (the Internal level)A look at how to store data in a reasonable level six, that's the format and structure. How data is stored, which is responsible for the actual data is stored in memory.
1. The internal (Internal level) is still looking for a way to store data in a Sikh collection. That has the form and structure. However, storage Which is responsible for storing it in memory.
1 internal level (Internal level) is the level that how to store the data in office collection level. The form and structure of storage. Which is responsible for storing actual data in the memory.