It seems that Louis Gerstner was really serious when he said in effect that the operating system wars were over and that Microsoft Corp had won – yesterday the company announced DB2 for Windows NT, promising that it integrates with NT operating system functions and supports four local network protocols – TCP/IP, NetBIOS, IPX/SPX and APPC. It complies with Open Database Connectivity Level 2, supporting 16-bit and 32-bit ODBC applications under Windows NT, and providing Windows95 client support.DB2 for Windows NT Version 2.1 comes in single-user and server versionsand has a one-time charge of $1,500 for the server version; it is to ship from November 24. The single-user version will sell for $370.