When preparing for the installation of an AS ABAP-based SAP system, after downloading all software components calculated by the Maintenance Planner, it is essential to download SAPCAR (D). SAPCAR (SAP Compression and Archive tool) is a command-line utility used to compress and decompress SAP software packages and patches, which are typically delivered in .SAR or .CAR file formats. This tool is crucial for extracting the installation and update files that are required for setting up the SAP system.