Focus on WEB, Database, and n-Tier Architectures.

Databases
Microsoft SQL Server, Oracle, DB2, Open Source.

Programming
.NET, ASP, Java, JSP, EJB, PHP, C/C++, Visual Basic.

Architectures

.NET, J2EE, Client/Server

WEB Servers/Applications
Microsoft, WebSphere, Tuxedo, Oracle iAS, WebLogic, BEA/Jolt