The spreadsheet was the original killer app that helped the PC gain a place on every desk, and it’s still one of the more powerful apps on your computer today. Whether you’re using Excel on your Mac or PC, Apple Numbers on your Mac or iPad, or Google Sheets or the Excel Web App in your browser, you can crunch numbers and discover more about your data with a few simple commands in a spreadsheet. Spreadsheets are deceptively complicated, and yet, once you figure them out, they’re simpler than any other number-crunching tool.

There's no reason to have cabinets full of paper cluttering your office, when all of that data could be saved on one hard drive and be infinitely more useful. Most of us have already started going paperless in some ways, since so much of our communications and documents are digital-first already, but you've still got to do something with all the paper documents you already have.

Presenting in front of an audience is a fear inducing event. Lower your anxiety and learn to deliver more compelling presentations through this informative series. 

Launched in October 2013, Mavericks is the latest iteration of OS X that ditches the big cat names (in favour of places in California) but adds functionality and features to the operating system. Maps, AirPlay Display, an evolved Finder, Tags and a number of changes under the bonnet--such as Timer Coalescing, App Nap, Compressed Memory and Safari Power Saver--see a major evolution of the the operating system that runs on your Mac.

Modern computing habits see each of us storing more and more data than ever before and, in turn, placing increasing reliance on (and faith in) the internal hard drive of our Mac. It's not a question of if your hard drive will fail as one day, it will fail. The question is when?

Terminal is one of the most useful and yet most intimidating features of OS X. If you know what you're doing, you can move mountains. If not, it's easy to screw up your system.