File System Shield - scans all files on-access, doesn’t scan files inside archives for minimal performance impact but no less protection as well
Web Shield - scans all files on HTTP protocol level, also scans files inside archives
Mail Shield - scans POP3/IMAP/NNTP protocols (attachements), scans inside archives and provides special heuristics on a e-mail message structure level (double extensions, external suspicious links, suspicious HTML structure etc)
IM Shield - scans files transfered through IM protocols, also scans inside archives (provides additional layer if File System Shield is disabled for whatever reason)
P2P Shield - scans files transfered through P2P protocols, also scans inside archives (provides additional layer if File System Shield is disabled for whatever reason)
Network Shield - scans and blocks malicious packets on TCP/IP protocol level (like those from Sasser or MSBlast) and now for a while also blocks malicious webpages on HTTP protocol level
Script Shield - scans and analyzes executed scripts and follows their actions during script execution
Behavior Shield - analyzes all actions of all applications being executing and running
This post is very pointless and what are you trying to explain, their are many people here in the Avast forum who know RejZoR very well who has been a long member for 8 years with Avast.
Edit: Also their are many people knows and understand about the Avast features of the software.