Modifications and changes introduced by users since the introduction of the Uniterm System of Coordinate Indexing by Mortimer Taube in 1952 are discussed in this paper. Many of these modifications and changes seem to represent a movement toward conventional specific subject heading and indexing techniques in the choice of entries, although this is obscured by the terminology. The authors suggest that conventional terminology be used where it is applicable, that the literature has largely concerned the method of choice of subject entry words rather than the principle of bibliographic coordination, and that users of the system might have profited by more direct comparison of their work with conventional techniques derived from Cutter's work of 1876.

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3.80; p Z 0.0007); there was no significant difference for assistant professorship (p Z 0.067) nor associate professorship (p Z 0.348). The overall mean h-index for all faculty was 17.64 +-16.89. For junior faculty (n Z 532), mean h-index was 8.21 +-6.57. For associate professors (n Z 244), mean h-index was 18.46 +-11.45, and for full professors (n Z 215) the mean h-index was 40.05 +-18.37. Citation-based activity differences between junior faculty and associate professor and between associate professor and full professor were statistically significant (p<0.0001). The overall mean h-index was 19.35 +-17.86 for men (n Z 668) and 14.11 +-14.05 for women (n Z 323); this difference was statistically significant (p<0.0001). Conclusion: The majority of academic radiation oncologists are assistant professors; fewer than 5% are underrepresented minorities. Men comprise more than two-thirds of the workforce. While there is no gender difference in achieving assistant professorship and associate professorship, men are significantly overrepresented at the full professor (by 78%) and departmental chair (by 280%) levels in academic radiation oncology. The average radiation oncologist at a comprehensive cancer center has published more than 17 manuscripts cited at least 17 times; the average full professor has published 40 manuscripts cited at least 40 times each, compared to the average junior faculty member who has published 8 manuscripts cited at least 8 times each. Contrary to previous findings comparing male and female residents, the difference in academic productivity by gender among faculty was statistically significant. These findings provide objective data to assess the radiation oncology academic workforce and provide a useful benchmark to measure change going forward.