Program database files are installed with various programs. They contain data in a structured database format and are typically referenced by the corresponding program while the program is running.

Multiple programs use program database files, but most save the files in a proprietary format. Therefore, a specific PDB file may only be recognized by one program.

Contains 3D coordinates of atoms present in a protein or other chemical compound; standard format used by RCSB (Research Collaboratory for Structural Bioinformatics) to study the 3D structure of biological macromolecules.

PDB files can typically be viewed within a Web browser that has a molecular viewer plugin installed.

Backup of a PowerDesigner database (.PDM) file; includes data saved in the database as well as references to other files; created as a backup in case the main database file needs to be restored.

PDB files are generated by PDAs that use the Palm OS. The PDB format supports multiple types of data, including text, images, and spreadsheets. It is also commonly used for eBooks distributed on the Palm platform.

Important: The Palm OS has mostly been replaced by other mobile operating systems, such as iOS and Android. It is possible to read PDB files on Android and iOS devices using third-party apps.