Unix Systems Administration (Solaris, HP-UX, Linux, AIX and Dynix/ptx)
Unix and NT Systems and Security administration (Connect:Direct, Secure+, Ssh, MQ, TCP Wrappers)
Unix Volume Management (Veritas Volume Manager, Veritas FileSystem, Disksuite)
Operating Systems (Unix, Windows, DOS, Novell)
Unix Hardware & Software (Sun, IBM, HP, Sequent)
Databases (Oracle, Ingres)
Programming and Design Methodologies