Bristol Technology Inc, Ridgefield, Connecticut, last week put out Wind/U 4.0, the latest take on its Microsoft Corp-sanctioned Windows-Unix cross-platform development kit. This stuff’s hallmark is said to be support for internet features such as Microsoft WinInet APIs and ActiveX; the ActiveX pieces are limited to COM and don’t include DCOM. On the other hand, it is supposed to have extended support for threads. Developers are supposed to write their applications on Window NT or 95 with Wind/U and then deploy them on Windows, Unix or OpenVMS platforms. IBM’s OS/390 is Bristol’s next targeted platform. It says users are currently working with its OS/390 beta – something it calls limited availability. The code should be out mid-April. Wind/U now provides Internet Explorer 3.0 common controls on Unix for the first time but this is not to be mistaken for Explorer-on-Unix, whose code is coming from Bristol through Microsoft – or maybe we should say not coming since it’s way late. Bristol claims the timetable is in Microsoft’s hands. The WinInet functions simply access the net using HTTP and FTP. Wind/U, which is priced between $10,000 and $12,000, runs on SunOS and Solaris, HP-UX, Digital Unix, AIX and Irix.