Prints the definitions of all procedures, variables, and property lists named in
contentslist to the current write stream.
See the Workspace Queries section for an explaination of the formats of
PO throws an error if it is asked to print out a procedure or variable name that is not in the workspace. However, it is not an error to ask PO to print out the contents of a property list that is not in the workspace. This is consistent with how GPROP behaves when asked to get a non-existent property.
PO stands for "Print Out".
TO xxx print "Hello ; comment end PO "xxxTO xxx print "Hello ; comment END