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Digital photos are stored as files on memory cards and computer hard disks. They can be stored in different file formats (each format has a unique file extension). Digital photo files can be compressed to save storage space and can use a standard or a proprietary format.

Digital photos are saved as digital files on electronic media. These digital photo files are a collection of bytes. JPEG is a standard file format for storing such digital photos. The JPEG to JPG format supports compression and allows very efficient high quality storage of digital photos. When using the JPEG format any software from different vendors that adheres to the standard can create and process JPEG files.

JPEG - Joint Photographic Experts Group

The JPEG file format was designed by a special industry group for the purpose of storing and compressing high quality digital photos. Later on JPEG became an ISO standard and it is probably one of the most popular formats for storing digital photos today. JPEG files are also known simple as JPG files (named after their common file extension .JPG).