An attachment can be almost any file. When someone attaches a file to a person’s post (question) they are uploading the file to the forum’s server. Forums usually have very strict limit on what can be attached and what cannot (among which the size of the files in question). Attachments can be part of a thread.
CM Answers Pro support attaching files to questions. Administrator can limit the size of the attachment and the file type« Back to Glossary Index