The Landesarchiv Berlin recently provided access to digitized name directories of the Berlin civil registry offices.
The large number of parishes and (since 1874) civil registry offices make family research more difficult in metropolises such as Berlin. If the address of the requested person or family is known or can be identified with the help of the Berlin address books, one can find the responsible office for the corresponding time period.
Digitization makes the research significantly easier and preserves the original documents. An archival visit is not necessary in many cases: if the document number was determined in the directory, a copy can be ordered directly from the archive.