The paper sent floppy disks to subscribers for accessing Mercury Center. The service featured a large amount of content for free: the print paper's full content, supplementary material such as documents and audio clips, stock quotes, and about 200 stories that did not make the print edition. A forum enabled readers to converse with each other and give feedback to reporters. However, the service's most popular content lie behind a paywall: back issues from 1985 onward and a "NewsHound" clipping service were popular with business users. Readers could enter alphanumeric codes, which appeared throughout the print paper, to quickly access online versions of articles that did not make print. Examples included for an article in the news section or for a press release in the business section. The Mercury Center staff comprised both news reporters and business "senders", who posted press releases online in addition to vetted content.