Microsoft

1980–1982
Introduced May 1, 1980.

1982–1987


Introduced April 1, 1982.

1987–2012


Microsoft launched its most well-known logo on January 5, 1987, and since then, has been cherished by many. It was dropped on August 22, 2012, but it's still used on older products and some portals. It was created by Scott Baker.

"The new logo, in Helvetica italic typeface, has a slash between the o and s'' to emphasize the "soft" part of the name and convey motion and speed." ''- Scott Baker

As of 2012, this is now being used as a secondary logo and still used along Windows 7, Office 2010, Xbox 360 and older Microsoft products.

2011–2012
With the launch of the new slogan in 2011, the Microsoft logo was altered slightly, reducing the slant.. This logo was the shortest-lived, was only used for one year.

2012–present


On August 23, 2012, Microsoft's most notable logo was retired and a new logo was commissioned. The new logo also includes four squares with the colors of the then-current Windows logo. This logo is, however, not completely new; a similar one was featured in Windows 95 commercials from the mid-90s.