The four parts of the judicial system include the:
Circuit Courts
Congress
Supreme Court
Electoral College
Court of Veterans' Appeals
district courts

Interpretation and application of law and order by court defines judicial system. It has some classes: Supreme court, Electoral college, District court and Court of Veteran's appeals.

Explanation:

In legal jurisdiction :

supreme court occupy the highest position in the hierarchy. It has supreme power over the nation.Electoral college consists of electoral members based on representative of congress. They casts one vote each in general election.District court deals with both civil and criminal cases in district level. It is a trial court in federal judiciary system.Court of Veteran's appeal is the board of experts who has the power to review the final decision taken by court.

The congress completes the diagram