Microsoft’s Steve Ballmer

Microsoft’s Steve Ballmer

Microsoft Corp. Chief Executive Officer Steve Ballmer speaks at an event in San Francisco. Office Mobile is technically free. But it’s useless unless you’ve already paid at least $100 for a year of Office 365, Microsoft’s effort to convert its traditional shrink-wrapped, purchase-one-time-only software business into a pay-as-you-go subscription model.

Microsoft Corp. Chief Executive Officer Steve Ballmer speaks at an event in San Francisco. Office Mobile is technically free. But it’s useless unless you’ve already paid at least $100 for a year of Office 365, Microsoft’s effort to convert its traditional shrink-wrapped, purchase-one-time-only software business into a pay-as-you-go subscription model.