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The commands available to you are :-
Exit Leave this program, and return to the @ prompt.
Help Display this message on the screen.
Information Display the information about this topic. This is terminated
(prematurely if you wish) by pressing the space bar.
Locate Search for a topic by name. A topic name CONTAINING the text
will be found. i.e. "for" finds FORtran or inFORmation.
Next Find the next topic name containing the requested text, see
Print Print the information about this topic on the line printer.
Run Run the program associated with this topic, if available.
Top Go to the start of the topics.
up-arrow Move the "-->" up one topic.
down-arrow Move the "-->" down one topic.
left-arrow Show the super-categories of this topic, if you get lost then
type T to get to the start of the topics.
right-arrow Show the sub-categories of this topic.