The Multics file system stores the file name as a single string, not split into base name and extension components, allowing the "." to be just another character allowed in file names. It allows for variable-length filenames, permi… 展开

Filename extensions may be considered a type of metadata. They are commonly used to imply information about the way data might be stored in the file. The exact definition, giving the criteria for deciding what part of the f… 展开

The use of a filename extension in a command name appears occasionally, usually as a side effect of the command having been implemented as a script, e.g., for the Bourne shell or for Python, and the interpreter nam… 展开

The default behavior of File Explorer, the file browser provided with Microsoft Windows, is for filename extensions to not be displayed. Malicious users have tried to spread computer viruses and computer worms by … 展开

• file (command)
• List of file formats
• List of filename extensions
• Metadata
• .properties… 展开

• Media related to Filename extensions at Wikimedia Commons
• Data Formats Filename extension at Curlie
• Database of filename extensions at FileInfo.com… 展开