Which MIME types are related to file extension ".tch"?
The .tch file extension is associated with 1 MIME types:
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
About .tch Files
TCH files are compiled help files used by Turbo C. They store binary help documentation for the Turbo C environment.
The MIME type application/octet-stream indicates a generic binary data file. This means the file holds data meant for specific software rather than standard text or images.
- Primary use: Turbo C help documentation.
- Format: Binary file containing compiled help topics.
- Software: Open them with the Turbo C IDE or compatible help viewers.
Relationship between file extension and MIME type
A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.
File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.
File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.
Associated MIME types
FAQs
What is a .tch file?
A .tch file is a compiled help file used by the legacy Borland Turbo C programming environment. It stores documentation and help topics in a binary format that the Turbo C IDE reads to assist developers.
How do I open a TCH file on modern Windows?
You cannot open these files natively on Windows 10 or 11; you must run the original Turbo C software using an MS-DOS emulator like DOSBox. Once the Turbo C IDE is running within the emulator, it automatically accesses the .tch file to display help content.
Why does Notepad show strange characters when opening a TCH file?
This happens because .tch files contain compiled binary data, not plain text. Because the system often identifies them as the generic application/octet-stream MIME type, text editors try to open them but display unreadable symbols instead of the actual documentation.
Can I convert a TCH file to PDF or Word?
There are no standard converters available for this proprietary, obsolete format. To view the information as a document, it is usually easier to search online for the original "Turbo C User Manual" in PDF format rather than attempting to decompile the .tch file.
Is it safe to delete TCH files?
Yes, if you are not actively using the Turbo C environment to write code, you can safely delete these files. They are only required for the help system within that specific legacy software and do not affect your operating system.
General FAQ
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.
MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.
How do I find the MIME type for a file?
You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.
Why can one extension have multiple MIME types?
Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.