In that decade, the search engine company has quickly emerged as the most successful business on the Web, and many expect it to dominate the next era of computing as thoroughly as Microsoft dominated the era of personal computers.

Google's age: 10

Microsoft's age: 33

Microsoft's revenue at age 10: $140 million

($279 million in today’s dollars)

Google's net income in the last 4 quarters: $4.85 billion

Google's revenue per employee: $1 million

Microsoft's revenue per employee: $672,000

Number of tech companies with a market value larger than Google's: 3 (Microsoft, I.B.M. and Apple, in that order)

Worldwide searches per hour on Google in July: 65 million

Worldwide searches per hour on Microsoft in July: 3.1 million