TREE – Representing the folder hierarchy
FIND – to find particular text in a given file
/N – Line number
/I – Case insensitive
Do google for FINDSTR – interesting one.
TASKLIST – Show all the active services
TASKKILL – Kill the particular one based on the PID (Process Id)
SYSTEMINFO – Various details about your m/c configuration
For security reason few field values are masked in above screen shot.