A handy device to make a note of anything important, to remind you of meetings, to do swift calculations, to keep a tab of your entire telephone directory, to wake you up at the appointed hour, believe me I would die of frustration if I didnt have it any minutes with me.You have information all around you if you want to make a note of important things the paper is the least good option since it flies away with time, but your casio stays with you for years to come. A good unit to carry around, keeps you organized without having to carry a bulky organizer.