* [Numeric (str)](../variables/numeric.md):
  Variables who's name is a positive integer, eg `0`, `1`, `2`, `3` and above
* [`ARGV` (json)](../variables/argv.md):
  Array of the command name and parameters within a given scope
* [`COLUMNS` (int)](../variables/columns.md):
  Character width of terminal
* [`HOSTNAME` (str)](../variables/hostname.md):
  Hostname of the current machine
* [`MUREX_ARGV` (json)](../variables/murex_argv.md):
  Array of the command name and parameters passed to the current shell
* [`MUREX_EXE` (path)](../variables/murex_exe.md):
  Absolute path to running shell
* [`PARAMS` (json)](../variables/params.md):
  Array of the parameters within a given scope
* [`PWDHIST` (json)](../variables/pwdhist.md):
  History of each change to the sessions working directory
* [`PWD` (str)](../variables/pwd.md):
  Current working directory
* [`SELF` (json)](../variables/self.md):
  Meta information about the running scope.
* [`SHELL` (str)](../variables/shell.md):
  Path of current shell