Insofar as syntax is concerned, therefore, it seems that it may be necessary to have a “preferred” language for each computer facility or system, and to have the time-sharing control language be consistent with the preferred. Insofar as semantics is concerned–or, at least, insofar as the association of particular symbols with particular control functions is concerned–I see that it would be possible, thought perhaps inconvenient, to provide for the use, by several different operators, of several different specific vocabularies. Anyway, there seems to me to be a problem, or a set of problems, in this area.