Neither the puppet docs, nor the internet indicates where r10k stands for
Bem, é explicado aqui :
It’s called R10K because I’m terrible at names. When I started working on R10K I couldn’t come up with a decent name. While trying to come up with something clever, I recalled that Randall Munroe wrote a bot for controlling IRC chatter, and gave it the most generic name he could think of - Robot 9000. Since I just needed a name, any name, I decided to go with an equally generic name by incrementing the robot index.