| Class | Type of work | January - June 1950 | July - December 1950 |
| A | Books, pamphlets, and serials | 1,166 | 1,032 |
| AA | Pamphlets and serials, also books not included in Part 1A | - | 1 |
| B | Periodicals and contributions to periodicals | 1,538 | 1,580 |
| C | Lectures and other works prepared for oral delivery | 4 | 2 |
| D | Dramas | 258 | 179 |
| F | Maps | 137 | 178 |
| G | Works of art | 12 | 5 |
| H | Reproductions of works of art | 0 | - |
| I | Scientific and technical drawings | 1 | 1 |
| J | Photographic works | 0 | 1 |
| K | Prints and pictorial illustrations | 50 | 64 |
| KK | Commercial prints and labels | 35 | 72 |
| L and M | Motion pictures | 110 | 144 |
| Total | 3,311 | 3,259 |
Table above based on tables in issues of the Catalog of Copyright Entries, 1950.