Liberation Mono

Liberation Mono
Liberation Mono

Liberation Mono


Liberation is the collective name of four TrueType font families: Liberation Sans, Liberation Sans Narrow, Liberation Serif and Liberation Mono. These fonts are metrically compatible with the most commonly used fonts on Microsoft Windows operating system and Office suite (Monotype Corporation’s Arial, Arial Narrow, Times New Roman and Courier New, respectively), for which Liberation is intended as free substitute.

Liberation Mono is styled closer to Liberation Sans than Monotype’s Courier New, though its metrics match with Courier New.

Liberation Monno supported IBM/Microsoft code pages 437, 737, 775, 850, 852, 855, 857, 858, 860, 861, 863, 865, 866, 869, 1250, 1251, 1252, 1253, 1254, 1257, the Macintosh Character Set (US Roman), and the Windows OEM character set,[citation needed] that is only the Latin, Greek, and Cyrillic alphabets, leaving out many writing systems. Extension to other writing systems was prevented by its unique licensing terms. Since the old fonts were replaced by the Croscore equivalents, expanded Unicode coverage has become possible.

The Liberation fonts were developed by Steve Matteson of Ascender Corporation as Ascender Sans and Ascender Serif. A variant of this font family, with the addition of a monospaced font and open-source license, was licensed by Red Hat, Inc. as the Liberation font family. Liberation Sans and Liberation Serif derive from Ascender Sans and Ascender Serif respectively; Liberation Mono uses base designs from Ascender Sans and Ascender Uni Duo.

The Liberation fonts were developed in two stages. The first release of May 2007 was a set of fully usable fonts, but they lacked the full hinting capability. The second release, made available in the beginning of 2008, provides full hinting of the fonts.

In April 2010, Oracle Corporation contributed the Liberation Sans Narrow typefaces to the project. They are metrically compatible with the popular Arial Narrow font family. With Liberation Fonts 1.06 the new typefaces were officially released.

Red Hat licensed these fonts from Ascender Corp under the GNU General Public License with a font embedding exception, which states that documents embedding these fonts do not automatically fall under the GNU GPL. As a further exception, any distribution of the object code of the Software in a physical product must provide the right to access and modify the source code for the Software and to reinstall that modified version of the Software in object code form on the same physical product on which it was received. Thus, these fonts permit free and open source software (FOSS) systems to have high-quality fonts that are metric-compatible with Microsoft software.

The Fedora Project, as of version 9 was the first major GNU/Linux distribution to include these fonts by default and features a slightly revised versions of the Liberation fonts contributed by Ascender. These include a dotted zero and various changes made for the benefit of internationalization.

Some other GNU/Linux distributions (such as Ubuntu, OpenSUSE and Mandriva Linux) included Liberation fonts in their default installations. The open source software included Liberation fonts in its installation packages for all supported operating systems.

Due to licensing concerns with fonts released under a GPL license, some projects looked for alternatives to the Liberation fonts. Starting with Apache OpenOffice 3.4, Liberation Fonts were replaced with the Chrome OS Fonts – also known as Croscore fonts: Arimo (sans), Cousine (monospace), and Tinos (serif) – which are newer versions of the same designs but made available by Ascender Corporation under the Apache License 2.0.

As of July 18, 2012, Liberation Fonts 2.00.0 and above are a fork of the Chrome OS Fonts released under the SIL Open Font License, and no longer include the Liberation Sans Narrow fonts.

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