The King of NYC Victorio Milian, at his Creative Chaos blog has organized and published an ongoing series titled 'HR 101'.
The goal of the series of articles: to provide introductions and insights on many of the seemingly 
'non-HR' subjects (Finance, Statistics, Law, etc.) to the many HR professionals that read his blog.
There are some fantastic pieces in the 'HR 101' series, and I was honored to be asked to participate with an article on HR Technology.
I highly recommend you check out the 'HR 101' project, you will find wonderful pieces from Jason Seiden on 'Statistics', Joan Ginsberg on 'Law', and Fran Melmed on 'Internal Communication' (and many more).
Thanks very much Victorio for allowing me to participate in the project!