Windows System Variables

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% Allusersprofile %: list all user profile file locations.
% Appdata %: lists the default storage locations of application data.
% Cd %: list the current directory.
% Clientname %: list the NetBIOS names of clients connected to a terminal service session.
% Cmdcmdline %: indicates the command line used by cmd.exe before startup.
% Cmdextversion %: indicates the extended version number of the current command handler.
% Commonprogramfiles %: lists the folder paths of common files.
% Computername %: Lists computer names.
% Comspec %: lists the paths of the executable command shell (command handler.
% Date %: list the current date.
% Errorlevel %: lists the error codes for the recently used commands.
% Homedrive %: Lists drive letters with the user's home directory.
% Homepath %: list the full path of the user's main directory.
% Homeshare %: lists the network paths of the user's shared home directory.
% Logonsever %: lists the domain name controller names of valid current logon sessions.
% Number_of_processors %: list the number of processors installed on the computer.
% OS %: list operating system names. (Windows XP and Windows 2000 are listed as windows_nt .)
% PATH %: lists the search paths of executable files.
% Pathext %: list the file extensions that the operating system deems executable.
% Processor_architecture %: list the processor's chip architecture.
% Processor_identfier %: lists the processor descriptions.
% Processor_level %: lists the computer processor models.
% Processor_revision %: indicates the revision number of the processor.
% ProgramFiles %: lists the paths of the Program Files folder.
% Prompt %: lists the command prompt settings of the current command interpreter.
% Random %: list the random decimal numbers between 0 and 32767.
% Sessionname %: lists the connection and session names used to connect to a terminal service session.
% Systemdrive %: The drive where the Windows startup directory is located is listed.
% SystemRoot %: the location of the Windows startup directory is listed.
% Temp % and % TMP %: lists the default temporary directories of currently logged-on user available applications.
% Time %: list the current time.
% Userdomain %: lists the names of domains containing user accounts.
% Username %: lists the names of users currently logged on.
% USERPROFILE %: list the location of the current user profile file.
% WINDIR %: list the location of the operating system directory.

% Allusersprofile % -------------------- all user profile paths
% USERPROFILE % ----------------------- current user's configuration file directory
% Appdata % -------------------------- current user's Application Path
% Commonprogramfiles % ------------- file path shared by the application
% Homedrive % ------------------------ current user's primary Disk
% Homepath % ------------------------ main directory of the current user
% ProgramFiles % ---------------------- default installation directory of the application
% Systemdrive % ---------------------- drive letter of the system
% SystemRoot % ----------------------- directory of the system
% WINDIR % ---------------------------- same as above, always the same as systemroot
% TMP % -------------------------------- temporary directory of the current user
% Temp % ----------------------------- same as the temporary directory