How do you assign customer numbers? Do you different categories, like mowing clients, cleanups, snowplowing, mulch/maintenance etc? I know some have software that dictate customer numbers, do they give categories? how do they number inside of program? just numerically? here is what i am trying to do. M05033 M05034 M05035 / M= weekly mowing account / 05 = year gaining customer / 035 = numerical number for each client C05033 C05034 C05035 / C= cleanup accounts / 05 = year gaining customer / 035 = numerical number for each client S06012 S06013 S06014 / S= snowplowing accounts / 06 = year gaining customer / 014 = numerical number for each client but then some fall under more than one category, but I also see importance of separating these accounts out. What do you think? Sean I bet you got a good answer for this. I use excel at this point (do not need anything else at this point in my career, so please do not suggest that, that will come in time) and I want them to be self generated, which I can do I just need the best numbering system.