The symbol ".\" is commonly used in computer file systems to represent the current directory. In many operating systems, such as Windows and Linux, it helps users and programs refer to the folder they are currently working in without needing to specify the full path. This makes navigation and file management more efficient. In command-line interfaces, typing ".\" followed by a file name allows users to execute or access files located in the current directory. This is particularly useful for running scripts or programs without needing to change directories, streamlining workflows for developers and system administrators.