Serving physics research and other demanding high performance test and instrumentation applications WIENER has developped a line of backplanes and accessories in various bus architectures. This line covers standard bus systems as CAMAC, VME, CERN VME 430, VME64x, VME64xP (VIPA) but also custom spec. backplanes. Based on the existing know-how and experience in standard architecture backplanes and high-frequency design WIENER can develop and produce any special backplane. WIENER VMEbus backplanes provide ideal signal and power distribution for both 32 and 64-bit applications. They are designed as multi-layer boards in a cross-talk reduced strip-line technolgy. The backplanes are actively terminated and provides automatic daisy chain either actively or mechanically (in connector, on request).  Monolithic VME backplanes are available with 5, 7, 9, 10, 15 or 21 (full size) slots.  The length of the any VME backplane is [number of slots] x [20.32mm]. Board height is given in 'U' ( 1U = 44.45mm).