The most common 'Editions' of Symantec Encryption Desktop and associated features are:
Symantec Drive Encryption: PGP Disk Encryption, PGP Zip, PGP Virtual Disk
Symantec Desktop Email Encryption: PGP Messaging, PGP Zip, PGP Virtual Disk
Symantec Encryption Desktop Professional: PGP Disk, PGP Zip, PGP Virtual Disk, PGP Messaging
Symantec Encryption Desktop Corporate: PGP Disk, PGP Zip, PGP Virtual Disk, PGP Messaging, Fileshare Encryption
Symantec Encryption Desktop Storage: PGP Disk, PGP Zip, PGP Virtual Disk, FileShare Encryption
Symantec FileShare Encryption: PGP Zip, PGP Virtual Disk, FileShare Encryption
Zip and Virtual Disk, along with the PGP Shredder, are included in each of the versions.