Quark 9 - Quick Key Guide
It's been a good few years since I last used Quark for desktop publishing. In the early days of digital design it was the one and only choice, but that was until Adobe came up with the radically superior InDesign. I'm pretty sure that if I had to, I could still work with Quark, it was very precise and had some excellent quick keys, but InDesign working with the rest of the CS suite, clearly has the edge.
Still... it's good to keep a handy quick key guide knocking about, just for emergencies.