Never used such system, but I'm inclined to believe in its promises. In addition to what I've recently commented in another HN post [1], this system also slightly resembles the classification system used in accounting. At a first glance those account numbers look cryptic and arbitrary, but soon enough you realize how helpful they are on enabling accountants to communicate and creating journal entries.

[1] https://news.ycombinator.com/item?id=36301140