I was always under the impression that Dilbert's company was some sort of sprawling conglomerate like G.E. that produces all sorts of products. Dilbert and his coworkers seem to bounce pretty freely between hardware and software products.
Also, I don't think continuity is one of Scott's goals at all. In fact, I suddenly realized how absurd it was to be discussing what is and isn't Dilbert Canon.
There is something cool about seeing a never-to-be-printed Dilbert strip, though.