14. Help

All commands are documented on the web (1) but also offline. Type at the prompt a command with the switch /? If you type
D:\test>CD /? [ENTER]
you'll get information on CD.

To find which commands are available, type
D:\test>HELP [ENTER]


Footnotes
(1) https://technet.microsoft.com/nl-nl/library/bb490890.aspx