The Globe-Weiss EverydayFile and Fast Sorter. This is basically an expandable book of A to Z sections. If you are catching up on a back log, it takes a lot more time to go back and forth between the tasks of process and file. With this, I process, highlight the key word on the paper that I will file the paper under or write it on a sticky note. After I am tired of processing, I can start the filing. All the items are sorted by letter. One trick is that if you put into the book some paper on a given subject and then find a related paper, it is better not to go searchng through to connect them during processing time.