Calibri

Calibri is a humanist sans-serif typeface family under the Microsoft ClearType Font Collection.

In Microsoft Office 2007, it replaced Times New Roman as the default typeface in Word[1] and replaced Arial as the default in PowerPoint, Excel, and Outlook. It will continue to be the default typeface in Microsoft Office 2010 applications.[citation needed]

Calibri was designed by Lucas de Groot for Microsoft to take advantage of Microsoft's ClearType rendering technology.

Characteristics
The font features subtle rounded stems and corners that are visible at larger sizes. The typeface includes characters from Latin, Latin extended, Greek, and Cyrillic scripts. OpenType features include small caps, subscripts and superscripts, and extra ligatures.

As with other sans serif ClearType Collection fonts, it includes unique italic type features, which are common in modern typefaces.

Availability
The typeface is distributed with Windows Vista, Windows 7, Microsoft Office 2007, and Microsoft Office 2008 for Mac.

This typeface, along with Cambria, Candara, Consolas, Constantia, and Corbel, is also distributed with the free Powerpoint 2007 Viewer,[2] the Microsoft Office Compatibility Pack,[3] and the Open XML File Format Converter for Mac.[4]

The retail version of the typeface is sold by Ascender Corporation, as well as by Monotype Imaging in MicroType format as part of the Vista 8 Font Set package.
---From Wikipedia