standard by the International Electrotechnical Commission (IEC) as IEC Publication 935-1990 and the FASTBUS The FASTBUS modular high-speed data acquisition and Standard Routine_ as IEC Pubficafion 1073-1991. FASTBUS control system has been described in earlier papers [1,2]. Newsletters are distributed to a large mailing list of users and Implementations have since been made m accelerator labora-producers alerting them as to any additional modifications, tories worldwide resulting in elarificat'ons, modifications and extensions or clarifications found to be desirable. extensions. Of tremendous beneht t,_ users have been FASTBUS Standard Routines. The availability of such II. SOME LABORATORY IMPLEMENTATIONS standard software is unique for high speed bus systems and resulted from the involvement of hardw,ue and software FASTBUS has been an important factor in recent succ.essspecialists in ali aspects of the development. FASTBUS is the ful experiments, including the Z0 measurements at CERN, highest performance instrumentation and data acquisition bus Fermilab _ SLAC. It hat, also been utili_,_d in many other in existence and its development was essential to handle the experimental programs in numerous major laboratories outputs of detectors used with high energy accelerators now in worldwide. Several hundre_ F.ASTBUS Module designs have operation. It has been an important factor in recent experi-bee__ registered and an estimated 20,000-30,000 FASTBUS ments, including the Z0 measurements at CERN, Fermilab and Modules produced and placed in service. Installations at a few SLAC. Also among t.,_unerous FASTBUS implementations are of the laboratories are described briefly below. those for TPC systems at KEK and BNL.