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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
PDB - Extension Details
Date Added: March 12, 2008
File Extension:  .PDB
Description 1: File extension .PDB is associated with the MOLMOL molecule description file. MOLMOL refers to a molecular graphics application that is used to display, analyze and manipulate biological molecules threedimensional structure, while emphasizing the study of DNA or protein structures NMR determines. The freely available .PDB program runs on Windows NT/95/98/2000 and UNIX.
Description 2: File extension .PDB is tied to the Insight II file. Advanced technologies featured in Insight II are in the process of being incorporated in the Discovery Studio research arena or environment. A number of key applications are now available including MODELER, Ludi, Profiles3D and CHARMm. With Discovery Studio built on an open platform, it can deliver not only premier software access, but also inhouse and thirdparty software integration.
Description 3: Extension .PDB is associated with the PowerDesigner Database Backup File. It attached to PowerDesigner database backup (.PDM) files. PDB files contain data that are saved in the database, along with references to other types of files. PDB files that are created act as backups; they come in handy when there is a need to restore the main database file.
Description 4: .PDB is the extension tied with the Protein Data Bank File. Such files contain 3D coordinates of atoms found in proteins or other chemical compounds. The .PDB features a standard format that the Research Collaboratory for Structural Bioinformatics (RCSB) uses in studying biological molecules 3D structure. Web browsers with molecular viewer plugins installed can be utilized to view .PDB files.
Description 5: .PDB is the extension for the standard data format used by various applications found on several Palmbased PDA gadgets and devices. Different datatypes can be stored in the PDB format from databases to word processing documents to image files to maps and spreadsheets. To find out what application created a particular PDB file, open the file concerned in a text editor. The Creator and Type codes should be somewhere in the file header located at the top portion of the document.
Description 6: PDB is short for PowerBASIC debugger. PowerBasic is described as the ultimate Windows Basic compiler. It was originally a 1985 Bob Zale TurboBasic 1.0 project at Borland. Following the release of the 1.1 and fearing inability to compete with Microsoft QuickBasic, Borland terminated the project and transferred the code rights to Zale who then left to start a company to market the product. Spectra Publishing published PowerBasic 2.0 in 1989. 1996 saw the release of PB 2.1 as shareware, FirstBasic. Zale formed his own firm PowerBasic Inc in 1993 to publish PowerBasic 3.0.
File Type:   Source Code and Script file
Mode: ASCII
Program(s) to Open:  DOS and Windows: PowerBASIC, offers compilers and other software program development tools
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