Each court maintains its own system, with a small subset of information from each case transferred to the U.S. Party/Case Index server, located in San Antonio, Texas at the PACER Service Center, each night. Records are submitted to the individual courts using the Federal Judiciary's Case Management/Electronic Case Files (CM/ECF) system, and usually accepts the filing of documents in the Portable Document Format (PDF) through the courts' electronic court filing (e-filing) system. Each court maintains its own databases with case information. Because PACER database systems are maintained within each court, each jurisdiction will have a different URL.