This article explains what ADOC files are, how to open them, and how to save them in another format.
A file with the ADOC file extension is most likely an AsciiDoc file. It is a plain text file used to create a formatted document, such as an HTML or PDF file.
AsciiDoc is a markup language for writing things like software documentation and notes, but it can also be used as the format for eBooks or slideshows, among other things. Therefore, the extension indicates that the file uses the AsciiDoc language to store this information.
Unlike other markup languages, ADOC files are very easy to use because they are simply plain text files that anyone can read in their raw text form, even if you don't know the language.