ABC programming language dyadic predicates
File type: Source code and script file
Files with dpd file extension contain dyadic predicates for the ABC programming language.
The file belongs to the ABC programming environment rather than representing a general-purpose document.
Found 5 different file type records with the same dpd filename suffix.
File type category:
Source code and script file
Date updated: October 12, 2026
Record marked as obsolete and not updated for a long time.
The dpd file stores dyadic predicates used by the ABC language. These predicates are part of the language environment and support operations involving two values.
ABC is an interactive programming language and environment for personal computing. It was originally intended as a good replacement for BASIC and was designed by first analysing the tasks involved in programming. ABC is easy to learn and was intended for beginners, but it also developed into a powerful tool for experienced users.
The ABC language and its dyadic-predicate files are obsolete, so the format is not generally used by current software.
Open a dpd file with a compatible ABC programming environment. It is an internal ABC language file and may not be meaningful when opened as a standalone document.
Because ABC is obsolete, a suitable historical or preserved ABC implementation may be required. A general text editor may let you inspect the file, but it does not interpret its predicates.
The dpd file is an internal ABC language file rather than a general document format, so it is not normally converted independently into a common document or source-code format.
To preserve its functionality, use it with a compatible ABC environment or manually recreate the required predicates in another programming language.
File type category:
Encoded and encrypted file
Date updated: February 24, 2019
The dpd file extension is related to the encrypted disk image created by Dekart Private Disk.
Dekart Private Disk is AES 256 bit data encryption software for Microsoft Windows operating system.
Use compatible tools to work with *.dpd files.
Probably cannot be converted to other formats.
Software applications that can open dpd files:
Microsoft Windows
Software apps that create dpd files:
Microsoft Windows
Software applications that handle other tasks involving dpd files:
Microsoft Windows
File type category:
Digital video and movie file
Date updated: October 19, 2018
The dpd file extension is also used for a special digital video format recorded using Dish Network DVD recorders.
Dish is an American provider of satellite TV.
No further information could be found.
You should be able to open edit these files using VideoReDo software.
Probably can be converted to other formats.
File type category:
Various data file
Date updated: June 22, 2019
The dpd file extension is also used by OmniServer, a fully configurable I/O server which interprets the data coming in from a device and delivers the data to any client program from Software Toolbox.
The dpd file contains some kind of data.
Probably not meant to be accessed by the user.
Probably cannot be converted to anything else.
Software applications that handle other tasks involving dpd files:
Microsoft Windows
File type category:
Document file
Date updated: September 27, 2026
Ovation Pro is a desktop publishing application developed by David Pilling. It is used to create and arrange documents for publishing, including formatted text and page-layout content.
A DPD file is Ovation Pro's document format. It stores the editable document rather than representing the document as a generic exchange format, so its contents are intended to be interpreted by Ovation Pro.
The format is associated with the Microsoft Windows version of Ovation Pro. Files may therefore require Ovation Pro for reliable access to their original layout and editing features.
Open a DPD file with Ovation Pro on Microsoft Windows. Install the appropriate Windows version of Ovation Pro, then use its Open command and select the DPD file.
Because DPD is an Ovation Pro document format, unrelated document or desktop publishing applications may not open it correctly.
Open the DPD file in Ovation Pro and use the program's printing or export facilities to create a more widely supported output, such as a PDF using a PDF printer. The exact result depends on the facilities available in the installed version.
Keep the original DPD file if the document needs to remain editable in Ovation Pro. Conversion to another format may not preserve all of its layout and editing features.
Software applications that can open dpd files:
Microsoft Windows
Software applications that can edit dpd files:
Microsoft Windows
Software capable of saving dpd files:
Microsoft Windows
Software apps that create dpd files:
Microsoft Windows
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