years 2006, 2005, and 2004. 

The revenue and operating income/(loss) amounts in this section are presented on a basis consistent with U.S. Generally Accepted Accounting Principles (“GAAP”) and include certain reconciling items attributable to each of the segments. The segment information appearing in Note 18 – Segment Information of the Notes to Financial Statements is presented on a basis consistent with the Company’s internal management reporting, in accordance with Statement of Financial Accounting Standards (“SFAS”) No. 131, Disclosures about Segments of an Enterprise and Related Information. Certain corporate level expenses have been excluded from our segment operating results and are analyzed separately. Fiscal years 2005 and 2004 amounts have been restated for certain internal reorganizations and to conform to the fiscal year 2006 presentation. 

 

Client 

 

 

Client consists of premium edition operating systems, including Windows XP Professional, Media Center Edition, Tablet PC Edition, and other standard Windows operating systems, including Windows XP Home. Premium offerings are Windows operating systems sold at a premium above Windows XP Home. Client revenue growth correlates with the growth of purchases of PCs from OEMs that pre-install versions of Windows operating systems because the OEM channel accounts for over 80% of total Client revenue. 

 

 

 

 

 



 

Client revenue increased in fiscal year 2006 reflecting $1.18 billion or 12% growth in OEM revenue driven by 17% growth in OEM license units from increased PC unit shipments, partially offset by a $118 million or 6% decrease in revenue from commercial and retail licensing of Windows operating systems. During the year, the mix of OEM Windows operating systems licensed with premium edition operating systems as a percentage of total OEM Windows operating systems licensed (“OEM Premium Mix”) increased two percentage points to 52%. OEM revenue growth included an increase to revenue of $89 million resulting from the alignment of our billings associated with OEM distributors in our system builder channel with both industry standards and other Microsoft channels. The differences between unit growth rates and revenue growth rates from year to year are affected by changes in the OEM Premium Mix, changes in the geographical mix, and the channel mix of products sold by large, multi-national OEMs versus those sold by local and regional system builders. Client revenue increased in fiscal year 2005 driven by 12% growth in OEM license units and $886 million or 10% growth in OEM revenue from increased PC unit shipments, partially offset by a $198 million or 9% decrease in revenue from commercial and retail licensing of Windows operating systems. The OEM Premium Mix remained flat at 50% of total OEM Windows operating systems as compared to the previous year. Revenue earned from Upgrade Advantage declined by $99 million in fiscal year 2005 contributing to the decrease in commercial and retail licensing revenue. 

Client operating income increased in fiscal year 2006 reflecting the increase in OEM revenue partially offset by a $224 million increase in sales and marketing expenses,