Johnny.Decimal – A System to Organize Projects

Never used such system, but I'm inclined to buy what's promised. Besides what I've reported in a recent comment [1], this system also slightly resembles the classifications 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