C/C++, Assembler, HTML/JavaScript/CSS/Perl, Delphi/Pascal, VB/VBA, 1С Предприятие 7.7,8.2, SQL
Java , ObjectiveC , Swift
WinAPI, WinSOCK, DirectX, MIDI, SQLDMO, COM/ATL, sockets, JAVA
MS SQL Server 2005, 2008
MS Windows, Linux
Visual Studio Delphi Borland