AMON – the resident (running in operating memory at all times) or "on-access" antivirus monitor. This program is the most crucial antivirus defense tool.
NOD32 – (also referred to as the "on-demand" scanner) this is the scanner executed manually by the user, or automatically by the scheduler.
IMON (Internet MONitor) - this scanner provides the first line of defense by monitoring Internet traffic (POP3 protocol for e-mail, other protocols e.g. HTTP, FTP are planned to be added)
DMON (Document MONitor) - this scanner provides protection from macro viruses in MS Office documments, works with applications utilizing MS Antivirus API (e.g. MS Office 2000 and higher, Internet Explorer 5.0 and higher)
EMON (Email MONitor) – this scanner provides protection from email-borne viruses for MAPI compatible mail clients (MS Outlook installed in Corporate mode)