Platforms:

• Embedded (68k, H8, ARM, i386, SLE88)
• Unix (Linux, Mac OS X, Solaris)
• Web (Apache, Tomcat, IIS)

Languages:

• C, Objective C
• Java (J2SE, J2EE, Java Card, JSP, Servlets)

Databases:

• SQL (mySQL, Microsoft SQL Server, Oracle 8i)
• JDBC (Java)
• DBI/DBD (Perl)

Communication Protocols:

• TCP/IP
• HTTP, SMTP, telnet, ftp
• Protocol design
• GSM, 3GSM (UMTS)