The technical specification for the JPEG File Interchange Format format is provided in both a PostScript and an ASCII version:
JFIF.PS is a PostScript version of the specification file.
JFIF.TXT is a plain ASCII version of the specification file.
The following FAQs may also be helpful:
JPEG_FAQ.TXT is a an ASCII document of the FAQs (Frequently Asked Questions) for JPEG.
COMP_FAQ.TXT is a an ASCII document of the FAQs (Frequently Asked Questions) about compression.
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