From The Free On-line Dictionary of Computing (19 January 2023):
Joint Photographic Experts Group
JPEG
jpg
<image, body, file format, standard> (JPEG) The original name
of the committee that designed the standard image
compression algorithm. JPEG is designed for compressing
either full-colour or grey-scale digital images of
"natural", real-world scenes. It does not work so well on
non-realistic images, such as cartoons or line drawings. JPEG
does not handle compression of black-and-white (1
bit-per-pixel) images or moving pictures. Standards for
compressing those types of images are being worked on by other
committees, named JBIG and MPEG.
Filename extension: .jpg, .jpeg.
See also PJPEG.
(2000-09-11)