(dot) shar file extention

[mocore]

has any one come across files with .shar file extension

i happened to find some *scripts packaged with this extension , and was expecting a script + concatenated archive 

 while i have see makeself ( http://tinycorelinux.net/11.x/x86/tcz/makeself.tcz.info )
 iv not encountered this method before 

 i also found few other examples in wiki at
 https://en.wikipedia.org/wiki/Shar

 and some other options @ https://stackoverflow.com/questions/20758981/self-extracting-script-in-sh-shell

 * http://okmij.org/ftp/packages/pipe_scripting.shar
.. via : http://okmij.org/ftp/Communications.html#sh-agents