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Dfont Format

Dfont stands for data fork TrueType and it is a special form of TrueType font format. The file is specifically for Macs operating systems that are running Mac OS X. Some of the system fonts that come preinstalled on OS X come as dfont fonts. This type of file format will not be on a different operating system. TrueType is a very popular font format on Linux, Windows and Macs computers. It looks very good on the screen and equally offers great quality in its output.




The TrueType font had been around for a very long time. It had been in use since the early parts of the 1990s. However, it is getting gradually replaced by the OpenType font format, which is more recent and features more functionality. The file can also be used on various versions of the Windows Operating System. Like the Windows XP, Windows Vista, Windows 8/8.1, Windows 7 and Windows 10.

Every end-user can easily access the active system fonts. The system fonts must be saved in the /Library/Fonts/ folder. The active user fonts, on the other hand, can only be accessible to the current end-user. And you must save it in the /users/username/Library/Fonts/ folder.

In the earlier versions of the Mac operating systems, like System 9, one could store data in two different entities, which are:

  • Resource fork
  • Data fork

The mechanism was equally sued for TrueType fonts in which all pieces of information related to the fonts was in the resource fork. When developing OS X, Apple decides to change its method of data storage from the forks concept. As a result, files only have a data part. As a result, the old System 9 TrueType fonts became obsolete and inapplicable in the regular data section of OS X files. Consequently, we end up with the data fork TrueType fonts or dfonts fonts.

You should not take anyone seriously that asks you to avoid the use of Dfont fonts in the professional publishing environments. This is because the quality of the Dfont fonts is similar to that of any other TrueType font. The only channeling is that the fonts are not compatible across different platforms.

How to open Dfont file

One of the best ways to open a dfont file is to convert it to another file. For one, you can convert it to other file formats, like svg, bin, otf and tff. The conversion makes it easier to open the file. The method adopted in opening Dfont File depends a great deal on the particular operating system that you are using.

In Windows

You can use in windows operating system one of the following programs:

  • File Viewer Plus
  • fontSplitter.



In MAC OS these are the available programs:

  • Apple Font Book
  • DfontSplitter.

You can equally open Dfont File using Font Book. Also using various other Mac Os X programs that have access to the system fonts. If you still have a problem opening the file, you can get in touch with field experts or automatic tools.

File type: dBASE Database Backup File


File Extension DBK

The DBK file extension supports the backup functionality of the dBASE RDBMS software. This file format represents the backup file created from the database file (either a DBF or a DB2 file extension format) prepared by the user. The DBK file extension may be generated automatically by the dBASE application like in the case of the original database file becoming corrupted.

In the context of information technology, a backup file refers to the process of creating copies of the data files in order to generate additional copies which can be used for restoring the original state of the data after it its lost.

The backup file is only accessible to the program that created it. This essentially means that it is useless without its host application. However, there are instances wherein interoperability exists between certain programs under the same category allowing one application to import the backup file created by another program.

In database management, a database file backup essentially contains the same information and structure as the original but in a compressed form which makes it unreadable by the program unless it is first extracted.


Open DBK File

Category: Backup File
File format: Proprietary
Open with Windows: dBASE
Open with Linux: Dbview
Normally, the procedure of restoring a backup file is referred to as disaster recovery. The process of restoring a backup file can be done based on a variety of options. A user may have the option to restore only portions of the database or the entire contents of the database.
In the same manner, the backup process can also be done full (all contents are backed up) or incremental (only newer items not yet contained in the existing backup file are appended). In any case, the use of the backup file is considered by many computer experts as one of the best practices in ensuring data integrity.
The requirements for the data storage media would vary considerably depending on the type of backup and the number of entries involved. It is a wise practice to create a single backup file with multiple copies rather than multiple volumes of a single backup file. For multiple volumes, it must be noted that in case one of the backup volume becomes corrupted, the entire backup may be rendered useless.

This file extension was developed by Appricon and categorized as a data file. It also comes in the text format. It is used by Analysis Studio, which is a data mining and statistical analysis program.

It contains mined data and it is stored in the form of a plaintext and tab-delimited format. It also includes an Analysis Studio header. They are usually used in storing data to be used for analysis online when it is connected to an Analysis Studio server; it can equally be used in online mode.

They are generally referred to as data files. Also, they can be called Analysis Studio offline data files. This format and the Analysis Studio software were developed by Appricon and the purpose was to make available to users offline analytical and data storage functionalities, as well as, analysis, management, storage, research and so on. Any user that gets disconnected from the Analysis Studio server can access it in offline mode.

Be that as it may, the Analysis Studio software also makes available user access to the content in online mode. The contents can include data encoded in tab-delimited or in plain text format.

It can contain data from different sources; examples of the sources are SQL Server and Microsoft Access databases. The files are paired with a corresponding .STP.

The .STP contains the object information and project data schema they have a tab-delimited format and can be imported into Microsoft Excel once the header information is stripped.

This extension is given to the files already created using different software applications. They are also used by the various software applications. The files are compatible with Mac, Unix and Linux operating systems. Most of them are stored in the binary format.

They can contain different types, like libraries, project, document files and several others.


How to open DATA files

If you are a Windows user, you can open it using the following programs:

  • WinRAR
  • WindowsR Internet Explorer
  • Microsoft Office
  • Any Video Converter
  • Dragon UnPACKer

Many of the programs highlighted above are available for free, but you will have to pay a token for some other programs.

You can launch a .DATA file or just any other on your computer by simply double-clicking on it. If you set up the association correctly, the application developed for opening it will get that done effortlessly.

There are times you will have the right application on your PC but it is yet associated with it. You can easily tell Windows the particular application to use for that. It will then become very easy to open it correctly using the right application.

It is not safe to rename the extension on this files or any other since this can change the type. You can only change the file from one type to another by using special conversion software only.


The .download file is categorized as a web file and has the Text and Binary format. It is a file being downloaded currently from the internet or a file paused or stopped while the downloading has not completed. You can continue with the downloading process by simply double-clicking on the file on the same web browser where you started the downloading originally.

.Download files are created by Mozilla Firefox and Apple Safari web browsers. When either Mozilla Firefox or Apple Safari is downloading a file, the file is automatically given the .download extension. If you are downloading greatname.mp4, for example, it will be renamed as by these web browsers. After the file has been downloaded, the .download will be automatically removed from the file name and the downloaded file will be available for use. While the file is being downloaded, it will most probably be seen in the "Downloads" folder.

If there is an interruption in the downloading process while it is going on, you will not have a problem recovering the file. All you have to do is to delete the .download extension and then open it using the right program. If you find it difficult to open the file, then it is advisable to delete the partially downloaded file and download it again.

A file that is actively being downloaded can also be saved by some P2PP file sharing websites using the .download extension. The extension will be replaced with the appropriate file extension at the completion of the downloading.

The download process is usually monitored by the Download Manager and virtually every device has a download manager already installed. If it does not come with the device, it should be present in the web browser you are using on your device, be it a PC or a mobile device. The Download Manager is responsible for adding the .download extension to the file being downloaded and for removing the extension after the downloading is completed.


How to open .download files

You can open .download files both on Windows and Mac Operating Systems. For those using Windows, you can access the file using both Mozilla Firefox and Google Chrome.

This is because each of these browsers automatically opens a folder for the files being downloaded. After the file has been downloaded completely, you can also access these files by opening the DOWNLOADS folders in each of these web browsers.

For those using MacOS, you can access or open the .download files using web browsers like Apple Safari and Mozilla Firefox.

If you cannot open .download files on your computer, you should never delay in installing any of the web browsers mentioned above provided it is compatible with the device you are using. Bear in mind that those using mobile devices can also open the .download files by downloading any of the web browsers described above.

Those using Android devices can download Google Chrome or Firefox on their devices with which they can open the .download file.

Those using Apple devices can download Safari or Mozilla Firefox on their devices with which they can access the .download file

Related extensions


File type: Macromedia Director Protected Movie


The DXR file extension is used with Protected Movie Files in Macromedia Director. The program is a profession authoring tool that combines a development environment with wide media support. Macromedia Director allows users to design content and create applications for kiosks, DVDs, CDs, and on the Web.

The files with the .dxr file extension contain animation or a movie made in Macromedia Director.

These files are similar to a file with the .dir file extension but the only difference is that files with the .dxr file extension are stored in a locked format and cannot be edited.

These files are usually used in the distribution of Macromedia Director Files. It is the format used to share with users who do not need to edit the composition of the movie.


Detailed information 


Category: Database Files
File format: Proprietary
Open with Windows: Adobe Director
Open with Linux: Adobe Director
Macromedia Director is now called Adobe Director since Macromedia has been acquired by Adobe Systems. The program lets users build applications, and is compared to a director in a movie.
The product was first developed for the production of animation sequences. A powerful scripting language known as Lingo was added to the program and it made it as the preferred program in the creation of Stand-alone kiosks and CD-ROMS, Adobe Director has the capability to support multimedia projects in 2D and 3D.
Director can also create files that can be viewed on the Web browser using a plug-in called Shockwave.


File type: MicroStation Drawing


The drawing file created by the MicroStation application developed by Bentley Systems uses the DGN file extension by default. This file supports the two- and three-dimensional drawing format normally deployed for use by the construction design application. This format file is based on the ISFF (Intergraph Standard File Format) or the newer V8 DGN specification standards.

Due to the proprietary nature of the DGN file extension, the user is provided with the option of converting it to the more commonly used DWG file type recognized by AutoCAD LDT. The MicroStation software is a CAD software package that is commonly applied to drafting and designing tasks.

This application is distributed exclusively for use under the Microsoft Windows Operating System platform although earlier versions were made available to the Macintosh environment with a few geared towards the UNIX Operating System. This application is one of the few engineering and architectural packages developed by Bentley that adhered to CAD standards and has the inherent ability of reading and writing formats in the DXF and DWG file formats.

The DGN file extension is also associated with the production of media outputs in the form of rendered image files, 3D Web pages in VRML, and animations. In this context, the application is closely associated with the BMP, AVI, JPEG, PDF, and VRML file formats.


Detailed information

Category: Vector Image Files
File format: Proprietary
Open with Windows: Bentley View, Bentley Systems MicroStation, Cimmetry Systems AutoVue, Autodesk AutoCAD LDT, IMSI TurboCAD, ESRI ArcGIS, Corel Paint Shop Pro Photo X2
Open with Linux: N/A
During its early stages, MicroStation was limited in the fields of architecture and engineering and was used specifically for the creation of construction drawings. With the evolution of its technology, it was able to advance into the field of rendering and modeling with feature sets such as keyframe animation, raytracing, and Boolean solids.
The DGN file extension supports the delivery of specialized environments that are extremely useful in plant design, mapping, civil engineering, and architecture.
Bentley re-engineered the DGN format file in 2000 to include functionalities like Design History and Digital Rights.
These new features are considered as revision controls providing the ability to reinstate previously applied revisions either by selection or globally. This innovation allows for better support for importing and exporting the DWG format of AutoDesk.
In addition to the revisions, many of the data restrictions that were enforced in earlier versions of the application were removed from the V8 format file. Some of the removed restrictions include limited drawing area and design levels.

File type: Mac OS X Folder Settings


DS or Desktop Services Store used by the Mac OS X Operating System platform is widely attributed with the creation of the DS_STORE file extension.

This specific format which is specific to the Macintosh environment is used for storing folder settings and viewing preferences of the user.

This file contains information regarding:

  • The location of the folder's window,
  • The size of the window,
  • View options that have been defined by the user (like column, list, or icons),
  • And the specific layout of the icons in the window.

This file type normally has a hidden property but can become visible when it is copied across networks, restored from backup files, or transferred to a Windows based computer system.

When the DS_STORE file format is deleted (whether intentionally or accidentally) the data contained in the folder will not be affected.


However, when the system cannot detect the presence of the DS_STORE file extension from within the folder, the Finder application will resort to the default settings for viewing opened folders.

mac os x

Detailed information 

Category: Settings Files
File format: Proprietary
Open with Windows: N/A
Open with Linux: N/A
There are no indications that the DS_STORE file extension was implemented by Apple Inc. in prior versions of its Operating System which makes it possible for Mac users using another version to not encounter this specific file type.
The DS_STORE file extension is created by default in every folder accessed by the user which also includes folders on remote systems like shared folders residing over SMB or those hosted on the AFP connections.
The user can copy this particular file to another folder which will prompt the Finder program to use the same customization for the target folder.
Previous versions of the Finder application resulted to the creation of several files with hidden attributes at the root of the volume accessed by the user.
Under the previous method, a single set of files is used for the storage of the metadata and settings for every folder contained under the entire volume. The creation of the DS_STORE file extension can be disabled by the user in the context of its creation on networked connections only.



File type: CD/DVD Labelling System Files, ODBC Data Source


What is

The DSN file extension is used to define system files in the application called CD Stomper. The files with the .dsn file extension are CD and DVD labeling system files and are used with the software to design and create impressive labels in a matter of minutes. The application can be used to create labels for music, data or photos. It lets a user easily design, print and then apply the label. The CD Stomper is a complete labeling system that includes pre-cut sheets for labels and removable tabs for easy application. The labels may be easily printed using an inkjet or laser printer. '


Detailed information


Category: Data files
File format: Proprietary
Open with Windows: CD Stomper, Microsft Applications
Open with Linux: Linux applications
The DSN file extension is likewise utilized as data source files for Open Database Connectivity (ODBC). ODBC is a standard method for Application Programming Interface software that utilizes Database Management Systems.
Statements in ODBC in a program allows a user to access files in a variety of databases such as dBase, Excel, Access, DB2 and text.
Although Microsoft is known to be the prime proponent that gave support for ODBC programming, the developers of ODBC aims to keep it independent from database systems, programming languages as well as Operating Systems. ODBC was initially launched in September 1992 by the SQL Access Group but Microsoft was first to create a product.
Some versions also exist for platforms like OS/2, UNIX and Mac.


File type: Database


What is .DBF format

The DBF file extension is a legacy file format from dBASE. It is  one of the pioneers in the computer industry in the field of data management.

The DBF format file represents a standard database file. To date, is utilized by the application along with other database management applications.

This format supports the organization of data into a series of multiple records. These records use an array data type to define types. It also maintains compatibility with a broad range of xBase applications or what are termed as dBASE clone applications.

The application made its debut in the computer industry via the dBASE II software. It proceeded up until the version IV of the software. Majority of these files types are supported by either Microsoft Access or Microsoft Excel.

This means that you can import into these programs under the Microsoft Office productivity suite. It is commonly associated with the NDX format file which represents the database index.


How to open a DBF File 

Category: Database File
File format: Proprietary
Open with Windows:
  • dBASE,
  • multisoft FlagShip,
  • Microsoft FoxPro,
  • Sage ACT!,
  • Clipper,
  • GTK DBF Editor
Open with Linux:
  • GTK DBF Editor
The DBF file extension was originally a proprietary format by dBase Inc for its database management software. Due to the early dominance in the computer market, it became a de facto standard.
Other database applications also incorporated the functionality of opening, editing, and saving the DBF format files allowing for their interoperability.
dBASE is a Vulcan software from Wayne Ratliff.  He created it in 1981. It became dBASE software after his partnership with Ashton-Tate.
The  company invested in continuous development efforts in the technology. This led to subsequent upgrade releases of the application.
Later the database programming market changed. The power of the Microsoft Office productivity suite became the leader.
It supports the storage of data compatible with nearly all types of database management including spreadsheet applications. Some software applications do not adhere to the dBASE standards. However, they have a built-in functionality for importing  and exporting it as another database file variant.

Open DBF File or Convert in Excel

Excel has a built-in converter from DBF to XLS.

  • Just open the file in excel.
  • Click Files type.
  • Select Dbase files
  • Excel will convert the file automatically.

Convert Online

You can convert it online. There are many file converters that will do.

For example or


File type: DjVu Image


What is

Developed by Paul G. Howard, Patrick Haffner, L'on Bottou, and by Yann Le Cun in 1996 at the AT&T Laboratories, the DJVU file extension and its accompanying technology are marketed by LizardTech. T

his format file represents a compressed format for image files designed to provide content providers with a way of scanning high resolution colored pages and images without the matching large file size. In this aspect, it is a viable alternative for use in publishing catalogs, magazines, books, and similar media over the Internet.

It introduces a tremendously better compression algorithm in dealing with images by compressing colored JPEG or GIF image files five to ten times better than other standards and three to eight times better compression when dealing with black and white TIFF-based documents. Another distinct advantage of the DJVU file extension is that it is a free file format based on the Open-Source licensing concept.

The source code for the file format's reference library can be downloaded from the host website.

The ownership for the commercial development rights for the encoding software has gone from one company to another in the recent years. The originators of this compressed file format maintain an implementation based on GPL. This is called DjVuLibre.


Detailed information 

Category: Raster Image File
File format: Open-Source
Open with Windows: WinDjView, Lizardtech DjVu Solo, Web browser with LizardTech DjVu Browser Plug-in
Open with Linux: N/A
The DJVU file extension operates by dividing one image into varying images and then applying separate compression for each instance of the image. In creating a DJVU format-based image, the first image must be separated into various components classified into a mask image, foreground image, and background image.
Foreground and background images normally fall under the classification of low resolution images (100 dots per inch or less). While the mask image must be a high resolution, bi-level image (300 dots per inch or higher) which normally contains stored text.
The foreground and background images are compressed via wavelet-based algorithm commonly called IW44.
The mask image on the other hand undergoes a compression method named JB2 which is similar to the JBIG2 algorithm.
The JB2 encoding standard is responsible for identifying nearly all of the identical shapes contained in the page like in the case of multiple instances of specific characters based on a particular size, style, and font type.
The compression of the bitmap is then based on the uniqueness of its shape and is done separately. It proceeds by encoding the location where every shape can be seen in the page.


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