The F.3d abbreviation refers to which type of legal documents?

The abbreviation F.3d refers to the third series of federal appellate decisions, which are published in the Federal Reporter. This series contains opinions and rulings from the United States Courts of Appeals, thus providing a comprehensive archive of appellate case law. The designation 'F' stands for 'Federal,' and '3d' indicates that these are the third series of reports, following the previous series, F.2d (the second series). Legal professionals and researchers rely on these reports to reference precedential decisions made by Federal appellate courts, which are vital for understanding case law and its evolution over time. Other choices do not correspond accurately to the established naming conventions used for publishing federal judgments.