They were pretty much obscure, remote code execution, kernel-level things that involved the Windows kernel and a couple of the Office apps.
Entourage and the other Office 2001 apps continue MS's dedication to a Mac-like look and feel and do not copy their PC counterparts in any significant fashion, UI wise.
Office apps open in the same day now as well.
Eventually, all the Office apps came along: Word, Project, Access, Outlook.
Nor do pupils get good grades by being good at Office apps, they have to mimic software engineers by following the design cycle to develop and produce a solution to a problem which was then submitted alongside their written papers.
PCWorld ran an article called "Windows Phone 7: Microsoft's Disaster" citing what they call a "lack of security, shockingly bad Office apps, an interface not backed up under the hood and abandonment of the full Microsoft customer base."
One such example of Office app is a heat map for Excel.
If you still run any Office apps, even the new ones, maxing out your RAM is about all you can do to make the performance tolerable.
There are several decent third-party iPad apps that can create and edit Office apps.