How Microsoft Office Became A Whole Computing 'Platform'

Microsoft says that Office is a platform. But you may have only thought of Office as ‘a piece of software’ before now. You may have classified Office as a core set of Windows apps supplied on a CD-ROM before the advent of cloud and Office 365. You may have even considered Office to be a ‘suite of integrated productivity applications’ if you are formal about these things. But you probably didn’t think of Office as a platform.