Final answer:
Legislative courts are specialized courts established by Congress to handle specific areas of law, which differ from general jurisdiction constitutional courts such as the U.S. District Courts.
Step-by-step explanation:
Courts established by Congress for specialized purposes are known as legislative courts. These courts, such as the U.S. Court of International Trade and U.S. Court of Federal Claims, have been created to deal with specific areas of the law. Appellate courts have appellate jurisdiction and are part of the traditional federal court system which also includes the Supreme Court and district courts. Legislative courts, on the other hand, differ in that they are set up by congressional acts pursuant to its legislative power under Article I of the Constitution.
For instance, the U.S. Court of Federal Claims hears monetary claims against the U.S. government, and the U.S. Court of International Trade handles cases involving international trade and tariffs. These specialized courts differ from constitutional courts, such as the U.S. District Courts and Courts of Appeal, which were created under Article III of the Constitution and have general jurisdiction on a wide range of federal matters.