It is an ‘Unix Compress File’ and is a compressed file
.z types of files are compressed files which are used for storing or packing files on Unix based devices.
It comprises of simple compression algorithm which is used for archiving files and saving disk space.
.z type of files can be decompressed on Unix computer by typing ‘uncompress filename.z’ (filename.z = the file which has to be decompressed)
GNUzip compression is being used to replace Z files and it creates .gz files. On Unix system, ZNew Utilizy to recompress Z files in to GZ Files.
.z files can be opened by :
Corel Winzip 16 Pro
Smith Micro Stuffit Deluxe 2010
On Mac OS:
Dare to be Creative Archiver
Smith Micro Stuffit Deluxe 2011