1-DBMS store data as file but RDBMS store data in a tabular form.
2-DBMS store data in either a hierarchical form or a navigational form but RDBMS store data in tables have an identifier called primary key and data values are stored in the form of tables.
3-In DBMS normalization does not exits but RDBMS normalization is present.
4-DBMS does not apply any security with regards to security but RDBMS defines the integrity constraint for the purpose of ACID.
5-DBMS does not support distributed database but RDBMS support distributed database.
Very good answer of DBMS Vs RDBMS