TrueType

TrueType is an outline font standard developed by Apple and Microsoft in the late 1980s as a competitor to Adobe's Type 1 fonts used in PostScript. It has become the most common format for fonts on both the Mac OS and Microsoft Windows operating systems.

The primary strength of TrueType was originally that it offered font developers a high degree of control over precisely how their fonts are displayed, right down to particular pixels, at various font sizes. With widely varying rendering technologies in use today, pixel-level control is no longer certain in a TrueType font.

History

The system was developed and eventually released as TrueType with the launch of Mac OS System 7 in May 1991. The initial TrueType outline fonts, four-weight families of Times Roman, Helvetica, Courier, and the Pi font replicated the original PostScript fonts of the Apple LaserWriter. Apple also replaced some of their bitmap fonts used by the graphical user-interface of previous Macintosh System versions (including Geneva, Monaco and New York) with scalable TrueType outline-fonts. For compatibility with older systems, Apple shipped these fonts, a TrueType Extension and a TrueType-aware version of Font/DA Mover for System Software 6. For compatibility with the Laserwriter II, Apple developed fonts like ITC Bookman and ITC Chancery in TrueType format.

TTF

TTF may refer to:

Science and technology

  • Tetrathiafulvalene, an organic compound used in electronics
  • Transcription termination factor, a protein that regulates transcription of genes
  • Thyroid transcription factor, another protein that regulates transcription of genes
  • Trend Type Forecast, an aviation weather forecast
  • TrueType, an outline font standard originally developed by Apple Inc.
  • Tumor Treating Fields (TTFields). A novel medical therapy to treat cancerous tumors with alternating electric fields
  • Music

  • Ten Thousand Fists, an album by the hard rock band Disturbed
  • The Time Frequency, a Scottish techno band
  • Tunnel Trance Force, a long-running trance mix CD series from Tunnel Records
  • Miscellaneous

  • Tax transparent fund, is the proposed authorised collective investment scheme structure in the UK
  • Timber Trade Federation, federation of British timber industries based in London
  • Title Transfer Facility, a virtual trading point for natural gas in the Netherlands
  • Titus the Fox, a platform game by Titus Interactive
  • NK2 homeobox 1

    NK2 homeobox 1 (NKX2-1), also known as thyroid transcription factor 1 (TTF-1), is a protein which in humans is encoded by the NKX2-1 gene.

    Function

    Thyroid transcription factor-1 (TTF-1) is a protein that regulates transcription of genes specific for the thyroid, lung, and diencephalon. It is also known as thyroid specific enhancer binding protein. It is used in anatomic pathology as a marker to determine if a tumor arises from the lung or thyroid. NKX2.1 can be induced by activin A via SMAD2 signaling in a human embryonic stem cell differentiation model.

    Clinical significance

    TTF-1 positive cells are found in the lung as type II pneumocytes and club cells. In the thyroid, follicular and parafollicular cells are also positive for TTF-1.

    For lung cancers, adenocarcinomas are usually positive, while squamous cell carcinomas and large cell carcinomas are rarely positive. Small cell carcinomas (of any primary site) are usually positive. TTF1 is more than merely a clinical marker of lung adenocarcinoma. It plays an active role in sustaining lung cancer cells in view of the experimental observation that it is mutated in lung cancer.

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    The Time Frequency

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    Latest News for: ttf

    Success Story: TTF (Matterport Inc)

    Public Technologies 10 Apr 2025
    ) Summary Innovative Thai events organizer, TTF, uses Matterport 3D cameras and digital twin technology to operate virtual exhibitions that augment its in-person events ... [...].
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