Which of the following acronyms relates specifically to managing files?

The acronym FCO stands for "File Control Officer." This position is specifically related to the management and oversight of files within an organizational context, ensuring proper tracking, organization, and accessibility of documents. The role usually involves implementing systems for file management, maintaining the integrity of records, and ensuring compliance with regulatory requirements for handling sensitive information.

In the context of managing files, the other acronyms do not pertain directly to file management. ETIC generally refers to a specialized training or oversight committee, FDB can relate to databases or systems but doesn't specifically address file management, and EWI typically stands for “Entry Without Inspection,” which is focused more on immigration violations rather than the organizing or controlling of files. This distinction highlights how FCO's key purpose connects to the management of files, making it the correct choice for this question.