hey
The information collected from an observation is called data.
3
From where do you want to access.
Data about data are called metadata. See the related question "What are metadata?" for more details.
It is called a data set.
Experiments, books, scientific articles, encyclopedia, catalogs, data bases, etc.
I think file is a open structure. and the data base is closed structure.
Doctors
it means file
This piece of data is called an "argument".
its called data redundancy.