ALLUSERSPROFILE
Generic user profile.
APPDATA
Path of the application data folder.
CLIENTNAME
Name of Client machine.
COMMONPROGRAMFILES
Path of common program files folder.
COMPUTERNAME
Name of Computer code is running on.
COMSPEC
Path of the cmd.exe program.
HOMEDRIVE
Current home drive designation, such as 'C:'
HOMEPATH
Path to current location for document storage.
LOGONSERVER
Specifies a domain controller for user logon authentication.
NUMBER_OF_PROCESSORS
Number of processors on current machine.
OS
Base name of the Operating System. Note that Windows XP is given as Windows_NT.
PATH
The current program path.
PATHEXT
Extension types of executable files.
PROCESSOR_ARCHITECTURE
Type of CPU architecture. For example, X86 for Intel Pentium processors.
PROCESSOR_IDENTIFIER
ID number of current machine.
PROCESSOR_LEVEL
More detailed description of the CPU architecture.
PROCESSOR_REVISION
Processor revision level.
PROGRAMFILES
Path of the program files folder.
SESSIONNAME
Name of the current OS session.
SYSTEMDRIVE
Drive the OS operates from.
SYSTEMROOT
Sets the system directory.
TEMP
Path of the temporary files folder.
TMP
Directory to store temporary files to.
USERDOMAIN
Specifies the domain of the current machine.
USERNAME
Name of the current user.
USERPROFILE
Path of the folder holding the current user's information.
WINDIR
Path of the Windows folder.