system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When saving a document on Microsoft Word "A file name can't contain any of the following characters: \ / : * ? " < > |". Why?
gpt
Windows uses these symbols for searches, command-line instructions, and the paths that define file locations. If you save using one of these then Windows does not know whether that is the file name or should be performing some other action.