R is the de facto statistical package in the Open Source world. It's also quickly becoming the default data-analysis tool in many scientific disciplines. R's core design includes a central processing engine that runs your code, with a very simple interface to the outside world. This basic interface means it's been easy to build graphical interfaces that wrap the core portion of R, so lots of options exist that you can use as a GUI.

An open-source battle is being waged for the soul of artificial intelligence. It is being fought by industry titans, universities and communities of machine-learning researchers world-wide. This article chronicles one small skirmish in that fight: a standardized file format for neural networks. At stake is the open exchange of data among a multitude of tools instead of competing monolithic frameworks.

Networking is one of Linux's strengths and a popular topic for our subscribers. For your weekend reading, we've curated some of Linux Journal's most popular networking articles.    NTPsec: a Secure, Hardened NTP Implementation by Eric S. Raymond

Each month, we provide a cartoon in need of a caption. You submit your caption, we choose three finalists, and readers vote for their favorite. The winning caption for this month's cartoon will appear in the June issue of Linux Journal. To enter, simply type in your caption in the comments below or email us, publisher@linuxjournal.com.

So many of you have asked how to help Linux Journal continue to be published* for years to come. First, keep the great ideas coming—we all want to continue making Linux Journal 2.0 something special, and we need this community to do it.

I don't always use Facebook, but when I do, it's over a compartmentalized browser over Tor.