LBR (file format) - définition. Qu'est-ce que LBR (file format)
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Qu'est-ce (qui) est LBR (file format) - définition

CONTAINER FORMAT POPULAR FOR DISTRIBUTING CP/M SOFTWARE
.lbr; .LBR; .lqr

LBR (file format)         
The .LBR file format was an archive file format used on CP/M and DOS operating systems during the early 1980s.
Archive file         
FILE THAT IS COMPOSED OF ONE OR MORE COMPUTER FILES ALONG WITH METADATA; USED TO COLLECT MULTIPLE DATA FILES TOGETHER INTO A SINGLE FILE FOR EASIER PORTABILITY AND STORAGE, OR SIMPLY TO COMPRESS FILES TO USE LESS STORAGE SPACE
Archive formats; Archive (computing); File archive; Archive file format; Compressed archive; Archive format; Archive files; Archiver format
In computing, an archive file is a computer file that is composed of one or more files along with metadata. Archive files are used to collect multiple data files together into a single file for easier portability and storage, or simply to compress files to use less storage space.
Image file format         
  • 50px
  • Categorization of image formats by scope
STANDARDIZED MEANS OF ORGANIZING AND STORING DIGITAL IMAGES
Image file formats; Image file; Image format; List of vector graphics markup languages; Graphic file formats; Graphic formats; Image formats; Graphics file format; Vector graphics markup language; Vector graphics markup languages; Graphics file formats; Graphics standards; Image files; Vector graphics file formats; Raster graphics file formats; Vector graphics format; List of image file formats; Raster file format
An Image file format is a file format for a digital image. There are many formats that can be used, such as JPEG, PNG, and GIF.

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LBR (file format)

The .LBR file format was an archive file format invented by Gary P. Novosielski used on CP/M and DOS operating systems during the early 1980s.

Packages in .LBR format were created by the LU program. It can act in interactive and parameter-driven mode, and can add, extract, delete files from the LBR package.

A companion program, still developed by Novosielski, is LRUN.COM : a small program which allows running a .COM (executable code) directly from any library, without having to extract it to a separate disk file.

Later compatible programs like NULU arrived for .LBR creation, and many tools such as LT and QL were capable of extracting from .LBR archives.

.LBR is an abbreviation of "Library", and, resembling the .tar file format, member files were only stored in the .LBR file, not compressed. As transfer of LBR files by modem was common, it was typical practice for archiving a collection of files to compress them using the SQ or CRUNCH programs then store them in an .LBR archive, or else (more rarely) store the files in the LBR archive, then use SQ or CRUNCH to compress the archive.

A compressed LBR archive file was given the extension ".LQR" (if squeezed) or ".LZR" (if crunched); however, it was more common to compress the members of the archive than to compress the archive as a whole.

As MS-DOS and other operating systems became more popular and displaced CP/M, .LBR's popularity waned.

The development of the ARC archiver which both compressed and archived files in one program went a long way towards displacing .LBR on MS-DOS systems; on CP/M systems, .LBR persisted longer due to the lack of a useful ARC port.