AS small alphanumeric signs

[tigger]

Let me see how I did it and hope we might get a good result: Maybe I might arrange it in another way. You might propose a better way.

So far I have:
Home: A, B, C,a,b, c
A: B,a,b
B: C
C:c

a, b, c: variables
A, B, C: subdirectories

What do see, if I typed a
1. in the home
2. in A
3. in B
4. in C

Well what I would like to know is: The value of a in HOME could difers to the value of a in A (like it is in HP)?