Surface represents a major shift in strategy for the Microsoft Windows business unit.

FORBES: Microsoft Announces Surface, Its New Windows 8 Tablet

Using our modifiable chart above, for a 5 million unit change in iPad sales by 2013 translates to around 1% shift in our price estimate.

FORBES: Honeycomb Ramps Up Google's Battle With Apple

In recent years, Time Inc. has been a drag on corporate-level results and revenue from the magazine unit hasn't recovered from the recession as advertisers continue to shift money out of print formats and onto digital ones.

WSJ: Time Inc. cuts 500 people, 6 pct of workforce

Unit growth may still result in single-digit or even negative revenue growth if the shift towards cheaper models has been pronounced enough.

FORBES: Apple's Regional Trends Will Face Close Scrutiny Tonight

Attending to all administrative matters pertaining to the Unit, including the Composition Unit, ensuring the proper and timely preparation of all types of reports, leave plans, shift-work timetables, etc.

UNESCO: Vacancy : Chief of Unit (18/4/2011) (ADM 307 - (P5))