This IDC Update provides the worldwide vendor market share results for PC processor vendors in the following segments during the third calendar quarter of 2007:

• Worldwide PC processor shipments by vendor for 3Q06, 2Q07, and 3Q07
• Worldwide PC processor revenue by vendor for 3Q06, 2Q07, and 3Q07
• Worldwide desktop PC processor shipments by vendor for 3Q06, 2Q07, and 3Q07
• Worldwide mobile PC processor shipments by vendor for 3Q06, 2Q07, and 3Q07
• Worldwide PC server processor shipments by vendor for 3Q06, 2Q07, and 3Q07
• Worldwide PC processor overall average selling prices and shipments for 3Q05–3Q07

The accompanying Excel spreadsheet data file includes the results of IDC's quarterly PC processor studies from 1Q05 to 3Q07 in a pivot table format. The data list for the pivot table, definitions, and methodology are also included.

Drafts of this IDC Update and data file were sent via email to clients of IDC's Semiconductors: Personal Computing research program on October 22, 2007.