The organization of the stores really sucks. Is it really that difficult to get them set up in a more logical way? As a new player I'd have to say that it's one of the most annoying aspects of the game. It took me a week to realize that there was any system at all, and I can't believe that someone thought that sorting Nanos alphabetically was the best way to do it. You'd have to know exactly what you're looking for by name. For new people it makes browsing a nightmare.
For Nanos I would think having them by level, and/or funtion would be much better. For implant components I would think at the very least sorting by the type of implant they fit into. The way it is now seems ridiculus.