Language differences have long presented a barrier to communication which is as troublesome as it is difficult to surmount. Further, it seems that modern scientific research has developed a second language barrier of its own to compound the difficulties encountered when national boundaries are crossed and to cause confusion and misunderstanding even among those sharing the same native tongue. For example, some readers may find it strange that an institute in quantumchemistryis the subject of a report to physicists, while, on the other hand, these same readers would find nothing inappropriate in the topic if it were alternately called an institute on atomic, molecular, and solid‐statephysics.