An open file is a software file that is currently being reviewed or modified.

File, Open, Open with, Software terms

If a file is in use by another user or program, it usually cannot be modified since multiple people making changes to the same file would cause conflicts.

  • How to open, view, and edit the contents of a file on a computer.
  • Unable to delete file: being used by another person or program.
  • Why do I get an ‘Open with’ window when opening a file?
  • All questions and answers relating to files and file extensions.