A couple of subreddits somehow relevant for machine learning and operations research [with a rough estimate of the number of subscribers]: http://www.reddit.co

A couple of subreddits somehow relevant for machine learning and operations research [with a rough estimate of the number of subscribers]: http://www.reddit.com/r/sysor/ http://www.reddit.com/r/sysor/ [2650] http://www.reddit.com/r/optimization/ http://www.reddit.com/r/optimization/ [200] http://www.reddit.com/r/algorithms/ http://www.reddit.com/r/algorithms/ [8960] http://www.reddit.com/r/machinelearning/ http://www.reddit.com/r/machinelearning/ [20000] http://www.reddit.com/r/BusinessIntelligence/ http://www.reddit.com/r/BusinessIntelligence/ [2100] http://www.reddit.com/r/database/ http://www.reddit.com/r/database/ [6700] http://www.reddit.com/r/datasets/ http://www.reddit.com/r/datasets/ [6900] http://www.reddit.com/r/datascience/ http://www.reddit.com/r/datascience/ [1800] http://www.reddit.com/r/opendata/ http://www.reddit.com/r/opendata/ [2800] http://www.reddit.com/r/analyzit/ http://www.reddit.com/r/analyzit/ [200] http://www.reddit.com/r/semanticweb/ http://www.reddit.com/r/semanticweb/ [2600] http://www.reddit.com/r/visualization/ http://www.reddit.com/r/visualization/ [8600] http://www.reddit.com/r/analytics/ http://www.reddit.com/r/analytics/ [1600] Edit: formatting