Some time ago I wanted to write an application to index content from Usenet groups. Usenet groups were the precursor to today's forums. Each group encompasses a topic, people can create new threads (called articles), and anyone can reply to those articles.
As opposed to forums, though, you don't access Usenet using an internet browser. Instead, you have to connect through a client that supports the NNTP protocol. Also, when accessing a Usenet server, you have a limited amount of concurrent connections to the server, let's say, 40 connections.
In summary, the purpose of the application is to use all the possible connections to retrieve and parse as many articles as possible, categorize them, and store the processed ...