Over 20 years, I have walked into different domains, some of my experiences are below. All I learnt in school was UNIX, C, C++, Oracle.
IT Security,
Networking,
Encryption Technology,
Technical Support,
Open Source Technology,
SW Development ,
Web Technology,
Database Management,
Win Servers,
Linux,
Solaris,
PKI,
Digital Certificates,
Certificate Authority,
SEO,
Domain name management,
Legality of Domain Names
Internet Laws
Switches,
Routers,
Biometrics,
JavaScript,
VB Script,
PHP,
Perl,
D2K.
ASP,
Apache,
IIS,
Cold Fusion,
Oracle,
MySQL,
MSSQL.