1 file extension

You can open file with 1 using special software abopted to do this. In order to open 1 file download one of the software.

How to open 1 file

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File type:
Unix Section 1 Man Page
Miscellaneous files

Man utility (Unix program used to view user manuals) manual page with plain text documentation inside, divided into several segments bounded by standard markers and used to store a level 1 user manual. The First level manuals describe only general commands of the Unix operating system. These files can be opened and edited with any text editor due to file's plain text formatting. 

How to open file with 1 extension?

GNU EmacsVi

Similar file formats and extensions.