What do A pos and C pos mean?
The # column is the rank of each listed entry for National Scientific and Technical Research Council — rank 1 means this entry is where National Scientific and Technical Research Council has the most articles or citations. A pos and C pos show the reciprocal: the position of National Scientific and Technical Research Council within that entry's own ranked list, by articles and citations respectively. A low value means National Scientific and Technical Research Council is among the most prominent contributors for that entry.