Where can I learn about file formats?
[Title edited for question clarity and future forum search... Mod]
Google? Do you specific file formats or a family of formats in mind?
Wikipedia has some excellent articles on image compression formats
JPEG - Wikipedia
TIFF - Wikipedia
I expect it will cover most image related file formats.
Here's an article I wrote: File formats
You can also read Adobe's page:
File formats in Adobe Photoshop
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