The primary database supported is FoxPro compatible, but we also include a license for our Microsoft SQL version of the products. Each company has its own set of data files and each year creates its own set of files for each accounting module by fiscal year. Therefore, you have years of actual data files that can be accessed and maintained for decades with instant access by simply changing the accounting date. There’s no losing days of transactions because the single master database has become corrupted and you have to restore from a backup that is several days old.