: Often denotes a specific catalog sub-number or printing variety.
You will need a tool like 7-Zip or The Unarchiver to open it and see the contents. Rox.7z
If you are looking for a specific document, could you clarify or what topic the "paper" is supposed to cover? 0001292814-16-006275.txt - SEC.gov : Often denotes a specific catalog sub-number or