You can look up units or functions in Frink by just typing part of the name preceded by a question mark, or 2 question marks for more verbose output. For exam

You can look up units or functions in Frink by just typing part of the name preceded by a question mark, or 2 question marks for more verbose output. For example, ?saturn or ??saturn will list the units that contain that substring. (The second example lists the units AND their values.) Typing ?barrel -> gallons will list all the barrel sizes it knows and their volume in gallons. Cool!