HKCert

Group 1: Operation Systems
Windows OS
LINUX
Mac OS
Solaris
Others OS
Mobiles & OS
UNIX
Network OS
VMWARE
Embedded OS
Application Platforms
Cloud & Cluster
Group 2: Servers
Web Servers
Database Servers
Internet App Servers
Network Management
Other Servers
Media Streaming
Group 3: Clients
Browsers
Email Clients
IM, Chat & VoIP
Social Networking
Productivity Tools
Audio & Video
Graphics & Design
Online Games & Entertainment
Group 4: Security software and appliance
Security Software & Appliance
Group 5: Web services
Web Services
Group 6: Attacks
Malware
DDoS
Identity Theft
Other