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Delicious It!List of commonly used Built in Windows Environment variables.
| Variable | Description | Example Value |
| %ALLUSERSPROFILE% | Path to the All Users Profile | C:\Documents and Settings\All Users |
| %APPDATA% | Path to location of default applications data store | C:\Documents and Settings\JDoe\Application Data |
| %CD% | Path to the current directory | c:\windows\system32 |
| %CMDCMDLINE% | Path to the command line (cmd.exe) used to start the current session | "C:\WINDOWS\system32\cmd.exe" |
| %CMDEXTVERSION% | Version number of the current Command Processor Extensions | 2 |
| %COMPUTERNAME% | Name of the computer | MYCOMPUTER |
| %COMSPEC% | Path to the command shell executable | C:\WINDOWS\system32\cmd.exe |
| %DATE% | Current date. (Same as the date /t command) | Mon 1/1/2000 |
| %ERRORLEVEL% | Error code of the last command | 0 (Zero usualy means no errors) |
| %HOMEDRIVE% | User's home drive letter as set in the domain. | U: |
| %HOMEPATH% | Path to User's home directory as set in the domain | \ |
| %HOMESHARE% | Path to the user's shared home directory as set in the domain | \\server\users\JDoe |
| %LOGONSEVER% | Name of the domain controller that validated the current session | \server |
| %NUMBER_OF_PROCESSORS% | System specifies the number of processors installed on the computer | 1 |
| %OS% | Operating System Name. | Windows_NT |
| %PATH% | Search path for executables | C:\WINDOWS\system32;C:\WINDOWS |
| %PATHEXT% | A List of the file extensions that are executable | .COM;.EXE;.BAT;.CMD |
| %PROCESSOR_ARCHITECTURE% | Processor's chip architecture | x86 |
| %PROCESSOR_IDENTIFIER% | Description of the processor | x86 Family 15 Model 1 Stepping 2, GenuineIntel |
| %PROCESSOR_LEVEL% | Model number of the processor | 15 |
| %PROCESSOR_REVISION% | Revision number of the processor | 102 |
| %PROMPT% | List of command-prompt settings | $P$G |
| %RANDOM% | Random decimal number between 0 and 32767 | 1234 |
| %SYSTEMDRIVE% | Drive letter containing the Windows directory | C: |
| %SYSTEMROOT% | Path to Windows directory | C:\WINDOWS |
| %TEMP% | Path to temporary directory (Same as TMP) | C:\DOCUME~1\JDoe\LOCALS~1\Temp |
| %TIME% | Current time. (Same as the time /t command) | 12:00:00.00 |
| %TMP% | Path to temporary directory (Same as TEMP) | C:\DOCUME~1\JDoe\LOCALS~1\Temp |
| %USERDOMAIN% | Name of the User's domain | MY-DOMAIN |
| %USERNAME% | User name of the Currently logged User | JDoe |
| %USERPROFILE% | Path to the profile for the currently logged on user | C:\Documents and Settings\Jdoe |
| %WINDIR% | Path to the Windows directory | C:\WINDOWS |