From Paid Content, a tale of two very different eras:
Yahoo In 1996
Age: 1 year
Annual sales: $1.3 million
Net loss: $0.6 million
Total raised in IPO: $33.8 million
Market value at close: $848 million
Employees: 49
Facebook In 2012
Age: 8 years
Annual sales: $1.2 billion-plus
Net income: $355 million-plus (2010 estimates)
Last valuation: $50 billion
Employees: 2,000-plus