The invention relates to a special, highly efficient cigarette filter. A side flange extending outwardly of the panel may also be included. The identifiers automatically scroll over the screen as a function of the position of the cursor on the screen thus defining the direction of scrolling. The suture cutter may include mechanisms which can be used to push and position a knot, so that a single device may be used to both push a knot and trim the excess material therefrom. In response to receiving the first list from the first backup server, the second backup server de-duplicates the first list against a second storage pool and conveys the second list to the first backup server.