January 15, 2008: Steve Jobs shows off the first MacBook Air at the Macworld conference in San Francisco, calling the revolutionary computer the “world’s thinnest notebook.”
The 13.3-inch laptop measures only 0.76 inches at its thickest point and 0.16 inches at its tapered thinnest. It also boasts a unibody aluminum design, thanks to an Apple engineering breakthrough that allows the crafting of a complicated computer case from a single block of finely machined metal.
In a brilliant piece of showmanship during the MacBook Air launch, Jobs pulls the super-slim laptop out of a standard interoffice envelope. (You can watch his keynote introducing the MacBook Air below).

January 14, 2009: Steve Jobs’ cancer worsens to the point that he takes a medical leave from Apple.
January 13, 2000: Steve Jobs’ longtime frenemy Bill Gates quits as Microsoft CEO. He steps down from the leadership role just a month after his company’s stock hit its all-time high.
January 12, 2005: Apple reports record earnings for the preceding three months. Impressive iPod sales during the holiday period, and demand for the latest iBook laptop, give the company a four-fold increase in profits.