With the launch of Office 2013, Microsoft is introducing a new way for you to buy its software. No need to go to the store for a shrink-wrapped boxed version, it's moved to a subscription-based model. For $99 you get what's called Microsoft Office 365 Home Premium. You can install the software on up to five devices in your household. This is nice since many families today have a main computer and then kids tend to have laptops of their own for schoolwork. The software can also be used on Mac computers, though Microsoft is still using Office 2011 for Macs.