In the original DOS operating system, the legal file name should be in the 8.3 format, that is, the file name should be up to 8 bytes and have a 3-byte extension. Neither the file name nor the extension can contain spaces.
Project nomenclature (or project number)_File nomenclature_Date_V version number. File suffix. For example: Doc_PCPISProposal_20101112.
The file name consists of four parts: the first part is the project name or number, the second part is the description of the file, the third part is the date of the current file, and the fourth part is the file stage identifier plus the file suffix.
If a file of the same version and at the same stage has been modified more than twice, a number will be added after the version identification, and the number will be incremented by 1 for each modification; when multiple people submit the same document at the same time, you can Add the person's name or abbreviation after the version identifier to distinguish it.
Extended information:
The DOS operating system stipulates that the file name consists of the file main name and the extension. The file main name consists of 1 to 8 characters, and the extension consists of 1 to 3 characters. Composed, the main name and the extension are separated by a small dot, generally called the 8.3 rule.
File extension is a mechanism used by early operating systems (such as VMS/CP/M/DOS, etc.) to mark file formats. In DOS terms, a file extension follows the file's main name, separated by a delimiter.