Trebuchet MS

Trebuchet MS is a humanist sans-serif typeface that Vincent Connare designed for Microsoft Corporation in 1996. Trebuchet MS was the font used for the window titles in the Windows XP default theme, succeeding MS Sans Serif and Tahoma. Released free of charge by Microsoft as part of their core fonts for the Web package, it remained one of the most popular body text fonts on webpages as of 2009.

Etymology
Trebuchet MS is named after the trebuchet, a medieval siege engine. The name was inspired by a puzzle question that Connare heard at Microsoft headquarters: "Can you make a trebuchet that could launch a person from main campus to the new consumer campus about a mile away? Mathematically, is it possible and how?" Connare "thought that would be a great name for a font that launches words across the Internet".

Distinguishing characteristics
Connare said in 2011 that "inspiration came from many sources such as the motorway signage in America and sans serif typefaces like Akzidenz Grotesk and Alternate Gothic." Writing on Typophile in 2005 and also in his 1997 article on Trebuchet, he also noted that a goal was to provide a typeface that worked well onscreen while providing a contrast in texture to Verdana.

Features of Trebuchet include:
 * The splayed edges of the uppercase "M " which form a 10° angle with a vertical line, reminiscent of a tighter version of Futura.
 * The shape of the tail of the uppercase "Q ".
 * The bar of the capital "A " is low.
 * The shortened tails of the lowercase "e " and the numerals "6 " and "9 ".
 * The hybrid open and looped tail of the lowercase "g ".
 * The rounded dots above and the shapes of the lowercase "i " and "j ".
 * The curved tail beneath the lowercase "l ", which prevents confusion with the uppercase "I ".
 * The dollar sign symbol "$ ", in which the vertical strike only appears above the top and below the bottom curves of the S.
 * The ampersand "& " in the form of an "Et" ligature.
 * The exclamation point "! ", whose dot is large and round.
 * Italic fonts incorporate italic type characteristics instead of just tilting roman glyphs, making it the first sans serif font family from Microsoft to use true italic features.
 * The bold version also has some distinctive features: pointed rather than square-cut tails on lowercase "a " and "l ", and slant-cut rather than square-cut ascenders.
 * The en dash and hyphen are essentially indistinguishable.
 * The Greek letter xi "<span style='font-family: "Trebuchet MS", sans-serif'>Ξ " has a vertical crossbar, reminiscent of its Phoenician root glyph samekh.

Availability
Microsoft refers to Trebuchet MS as "a good web design font", being one of their "Core fonts for the Web". Trebuchet MS is included with several products, including the Windows operating system, components of the Office productivity suite, and Internet Explorer.

In some versions of the font (those shipped with Windows 2000 and early versions of Internet Explorer), the opening quotation mark character was flipped vertically like so: <span style='font-family: "Trebuchet MS", sans-serif'>‟. This error was fixed in later versions.

Trebuchet MS has been released with the Microsoft Windows operating system since Microsoft Windows 2000. The typeface has been released with Internet Explorer since version 4.0 and Microsoft Word since Word 2000. It is also included with macOS, iOS and ChromeOS.

The Trebuchet 2010 font family was introduced by Ascender Corp in July 2010 as part of the Ascender 2010 Font Pack. In addition to extensive OpenType typographic feature support, the family was extended with new black and black italic fonts. The new weights and OpenType features were developed by Ascender's Steve Matteson and Terrance Weinzierl.

Trebuchet Pro
In 2010, Ascender and Microsoft released an expanded version of Trebuchet for commercial sale. This included additional features such as small caps, stylistic alternates and text figures, as well as an additional Black weight with italic.