Google Inc

Foundation Date

•  September 4th, 1998.

Founders

• Sergey Brin and Larry Page

Taglines

•  Don't be evil - It is company's unofficial slogan that was coined on July 2001

Logos

•  Apart from the official logo, Google has many holiday logos and fan-created logos. If interested you can find them at http://www.google.com/logos/index.html.

Ticker Symbol

• NASDAQ -  GOOG

You can get more information about the company from Google and Wikipedia.

By the way, the name 'Google' comes from the term 'Googol', which is a mathematical term for a number followed by 100 zeros. This name was choosen to reflects the mission of organizing a seemingly infinite amount of infomation on web. Before this name, the company was known as 'BackRub'

Yahoo! Inc

Foundation Date

•  March 1st, 1995

Founders

•  Jerry Yang and David Filo

Taglines

• It's Y!ou - Sep 2009
• Do You Yahoo!
  

Logos

Purple Logo - This is the official logo of Yahoo

White Logo (transparent background)

Y! Bang Logo

1995 - Original Logo; displayed in the main page of Yahoo.com



Ticker Symbol

•  Nasdaq - YHOO

You can get more information about the company from Yahoo and Wikipedia.

For people who don't know YAHOO is an acronym for "Yet Another Hierarchical Officious Oracle"