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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
PCD - Extension Details
Date Added: January 01, 1970
File Extension:  .PCD
Description 1: PCD is the file extension identifying Kodaks file format for saving photos onto CDs. It has to do with the companys proprietary format for storing different images on photo CDs. Photographs scanned using Kodak photo processing hardware are saved using the PCD file extension. Photo CD images are generally scanned at a 3072x2048 pixel resolution, but they can also be scanned at 6144x4096 using the Kodak Pro Photo CD service. Both these formats utilize 24bit color.
Description 2: .PCD is an extension linked to a Photo CD format that was developed sometime in the early 1990s by Kodak and Philips. The photo CD refers to the CDROM extended architecture implementation, designed for holding photographic images. CDROM XA architectures mode 2 form 1 are the ones used technically for the PCD file. Find photo CDs defined within the "orange book specification.
File Type:   Bitmap Image file
Mode: Binary
Program(s) to Open:  Use Nero PhotoSnap
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