The File Extensions Database

.TDT File Extension

  • Developer by: LogicSphere
  • Category: Data Files
  • Format: Text

What is an .TDT file?

.TDT is FirstBreak Concrete Test File

File used by FirstBreak, a program that tests the strengths of concrete mixes; contains the test results of concrete batches, including the batch reference, date, test specimen strengths, slump, air content, and temperature.

TDT files are used for logging concrete tests and providing input into FirstBreak statistical analysis tests. They are stored in a .CSV format.

File Type 2 Sim Tower Game File
Developer by: Maxis Category: Game Files

File created by Sim Tower: The Vertical Empire, a tower construction and management simulator; contains tower gameplay data such as a bank, office, cinema, or hotel; not meant to be manually opened.

NOTE: Sim Tower was developed for Windows and Macintosh and released in 1994. It is no longer maintained. If you want open the application you will need a DOS emulator such as DOSBox.

Programs that open Sim Tower Game File
Maxis Sim Tower: The Vertical Empire
Maxis Sim Tower: The Vertical Empire
Maxis Sim Tower: The Vertical Empire
File Type 3 AVCHD Thumbnail File
Developer by: Sony and Panasonic Category: Video Files

Thumbnail file created by Sony and Panasonic digital camcorders; contains thumbnail stills of recorded video in the AVCHD (Advanced Video Coding High Definition) format; appears in folder when connecting camcorder to computer; not meant to be manually opened.

TDT files can be found, along with .TID files, in the AVCHDTN folder, which is held within the AVCHD folder, which is held in the Private folder contained within your camcorder.

Common TDT Filenames

THUMB.TDT - Only name of Sony/Panasonic TDT files.

File Type 4 THOR Data Tree File
Developer by: Daylight Chemical Information Systems Category: Data Files Format: Text

THOR Data Tree (TDT) file used by THOR-Merlin, a database program used to store and retrieve chemical information; contains data similar to a thesaurus that relates chemical information and concepts.

TDT files are used to relate information and transmit information between programs that use different languages and terms. They are stored in a plain text format, but are not easily human-readable due to their custom syntax.

How to solve problems with TDT files

  • Associate the TDT file extension with the correct application. On :
    Windows: Right click on any TDT file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.TDT files". Mac: Right click (or Ctrl-click) the TDT file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .TDT is FirstBreak Concrete Test File. Because only the current version supports the latest TDT file format. Search, therefore, e.g. on the LogicSphere manufacturer website after an available .TDT is FirstBreak Concrete Test File update.
  • To make sure that your TDT file is not corrupted or virus-infected, get the file again and scan it with antivirus software.