Command-line help for console commands.
Most commands will give help when run with:
COMMAND /?
or
COMMAND -?
Help will not detect if Command Extensions have disabled and will print help messages assuming the extensions are available.
GUI Help files (WINHELP and WINHLP32.exe) are no longer supported.
Equivalent PowerShell: Get-Help - Open the help file.
Equivalent bash command (Linux): man pages.