Step 7
The compiler compiles the DATALINES statement. It says, "The data will follow this line. End of data step"

DATA POINTER;  
   INPUT @1  ID       3.  
         @5  GENDER  $1.  
         @7  AGE      2.  
         @10 HEIGHT   2.  
         @13 DOB      MMDDYY6.;  
FORMAT DOB MMDDYY8.;  
DATALINES;

Results (nothing changes)
The Program Data Vector (PDV):

variable	characteristics
_N_	numeric, length 8
_ERROR_	numeric, length 8
ID	numeric, length 8
GENDER	character, length 1
AGE	numeric, length 8
HEIGHT	numeric, length 8
DOB	numeric, length 8, format mmddyy8.

The input buffer

On disk:
(nothing).