On this DBabble server, it is the 50 most recent items, but this may differ on other servers. To see older items, click on the Get More Articles button. Every time you press this button, it will download the headers for 50more articles. Since articles are ordered by date, replies posted to articles may not be near the original article, and you would have to press the Get More Article many times before the original would be available. Instead, you can right-click on the article title and choose Download Entire Thread Headers to get a full list of articles in that thread.
Any article posted in a discussion can optionally have a file attached to it.
If you are reading such an article, the attachment name will be listed in red at the top of the article. Right click on the attachment name to view or save it to disk. By clicking on the Files tab in the discussion window, a list of articles that have attachments is listed. In this way you can find articles with attachments more quickly. You can post a new article to a discussion by selected New Post from the Post menu in the discussion window.