Wireless Data Networks: Motient (Datatac), Cingular (Mobitex), CDPD, Proxim (802.11), Inmarsat-C Computer Languages: C++, C, UML, Visual Basic, Perl, HTML, SQL, Postscript Technologies: MFC, COM/DCOM, ATL, MAPI, ActiveX, TCP/IP RFC protocols, XML, Proxy servers, threading. Operating Systems: Windows 98/NT/2000, Windows CE, PocketPC, Solaris, Linux, SuperTask!, NucleusOS. Handheld Operating Systems: Windows CE (Cassiopeia, HP Jornada, Symbol, Telxon, Intermec), Research In Motion (Blackberry), PalmOS