Microsoft launches its Windows 8-friendly products , Office 13 and Office 365 . Office reigns as Microsoft 's most lucrative product with 90 % market share of PCs . In the past , a confusing design change or dropped support for plug-ins has been reason enough for users to skip the upgrade and stick with the version they 're comfortable with . Expanding Office to tablets will be necessary for growth .
Microsoft launches its Windows 8-friendly products , Office 13 and Office 365 . Office reigns as Microsoft 's most lucrative product with 90 % market share of PCs . Expanding Office to tablets will be necessary for growth .