A one-time purchase
Install on one PC
Classic Office apps
Office 365 is a subscription that comes with premium apps like Word, Excel, PowerPoint, OneNote, Outlook, Publisher, and Access (Publisher and Access available on PC only). The apps can be installed on multiple devices, including PCs, Macs, iPads, iPhones, Android tablets, and Android phones. Office 365 also comes with services like 1TB of OneDrive storage, 60 Skype minutes per month, and Microsoft chat and phone support. With a subscription, you get the latest versions of the apps and automatically receive updates when they happen.
Office 2019 is a one-time purchase that comes with classic apps like Word, Excel, and PowerPoint for PC or Mac, and does not include any of the services that come with an Office 365 subscription. One-time purchases don’t have an upgrade option, which means if you plan to upgrade to the next major release, you'll have to buy it at full price.
To see if your computer, mobile device, and/or browser can run Office, please visit the Office system requirements page.
Internet access is required to install and activate Office, but not to use Office applications such as Word, Excel, and PowerPoint once you have these fully installed on your computer.
People using Office 365, Office 2019, Office 2016, 2013, 2010, and 2007 as well as Office for Mac 2011 and 2008 will be able to open and view your documents, but those on earlier versions may need to install a compatibility pack.
Yes, the Office 365 Training Center has quick start guides, cheat sheets, tips and tricks, and training courses on how you can make the best use of Office.
Office 365 FAQ with chat link: https://products.office.com/microsoft-office-for-home-and-school-faq