This plan is very, very out of date. The ChiLo Buying Guide is a much better source for up-to-date collection building advice.
This is a plan for building a Netrunner collection, starting with one copy of the core set and adding a little at a time. Each “stage” of this plan includes one or two decks that can be built at that stage.
Check out the introduction for some general information about building a Netrunner collection and about this plan, or go to the summary table if you want to see the whole plan laid out in one spot. The pages for the individual stages include links to the actual deck lists, plus usually some infomation about how you can learn more about playing the deck(s).
The source and data behind this plan is in this GitHub repository over here.