Scanning

[Dooma]

>For what purpose you need your scans? For print or for web?

I want to upload them on a site for users to download, they may read or
print

>This is pretty good for printing, but tiff would be better format, if you 
>want it to not to loose any data. Sometimes you might need to scan comic 
>pages with "desreen" filter, it omits moiré -phenomena that comes from 
>scanning images with halftone (small raster dots).

What is "tiff" and how does it prevent data loss?
What is desreen filter and moiré -phenomena