DEC has introduced version 4.0 of its VAXeln real-time operating software in the UK, saying that the new release adds DECwindows support, so that it can now access other VAX computers in a network without affecting its monitoring or control functions; the new release also adds a new Set Host facility that enables networked realt-time VAX system to connect users via the X Window System-based product to other VAXes on the network, and windows on a workstation can display VMS, MS-DOS and Ultrix applications concurrently with VAXeln; it will be available sometime this summer, with prices starting at UKP2,900 for the host and $290 for the target system on MicroVAX II.