Filter help

[FlexibleLearning at aol.com]

Okay, so one day I'll track down a list of Bourne Shell options as mentioned 
in the Help entry on Filters, but just for now...

[1] Using AND
How do we filter to extract both *.gif AND *.jpg from a list of file names?

[2] Using NOT
And how do we do the reverse, such as 'All files except *.txt' ?

Any pointers would be truly appreciated!

/H
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