I'm working on an attachment upload script for a professional / business website, which will display a list of all attachments with an icon representing their file type.
I have icons for most expected filetypes, word, pdf, excel etc...
But I need one for 'Unknown file type', just in case someone uploads a random file. Could anyone suggest an icon?
A quick google search produces mainly question marks, which I guess are fine but I'm wondering is there possibly a convention for this?