Links #6

• Data Visualization - A practical introduction, via bactra.org: "This book is the best guide I've seen to (1) learning the widely-used, and generally handsome, ggplot library in R, (2) learning the "grammar of graphics" principles on which it is based, and (3) learning the underlying psychological principles which make some graphics better or worse visualizations than others"
• You’re probably using the wrong dictionary
• OOP Before OOP with Simula
• Lessons learned scaling PostgreSQL database to 1.2bn records/month