```html

Difference between Field Symbol and Data Reference Variable in SAP ABAP Programming

In SAP ABAP programming, a field symbol is a placeholder for a data object whose content can be changed during runtime, while a data reference variable is a variable that points to the memory location of a data object.

The key differences between a field symbol and a data reference variable are:

1. Assignment: A field symbol is assigned to a data object at runtime, allowing for dynamic referencing of data, whereas a data reference variable is assigned the memory address of a data object.
2. Modification: Field symbols can be used to modify the content of the data object they point to directly, while data reference variables require dereferencing before modifying the data object.
3. Data Type: Field symbols do not have a specific data type, allowing them to point to any data object, while data reference variables are strongly typed and must match the data type of the data object they are pointing to.

Both field symbols and data reference variables are powerful tools in SAP ABAP programming that enable developers to work with dynamic data structures and improve performance.

```