Object in memory = value
string firstName, string lastName, int age -> scheme Structural Data Model
"Bob", "Joe", 21, true, "false", 12/01/2026, 0, 25.32, ....
values
bit 0,1
byte 00000000<0> -> 11111111<255>  128,64,32,16,8,4,2,1  10000001<129>
char UPPER 0100<64> 0110<96> 'B' 01000010<B> 'o' 01101111<o> 'b' 01100010<b>
string "Bob"
int 01100010 -> 98
...others

collection classes -> INdependent values "Bob", 21, "Mary", true, 12/02/2026
"Bob", "Joe", "Mary"
List <ArrayList> ["Bob", "Joe", "Mary"] CRUD, mutable, append, indexed R/W
Set {"Bob", "Joe", "Mary"}
Tuple <Array> ("Bob", "Joe", "Mary") immutable, Read Only
Dict/Map { firstName: "Bob" }, { firstName: "Joe" }, { firstName: "Mary" }


dimensional data -> Dependent values Excel Sheet / Worksheet
1 Dimensional Array (Single List of Values) column / Series  type dependent
2 Dimensional Array column / row -> value table.grid [row][col]
3 Dimensional Array pivot table / cube  [table][row][col]
