You might want to take a look at http://www.hardhats.org/ a website specifically devoted to VistA for users of the FOIA product. (Because VistA was developed by federal employees, it is available through the Freedom of Infomation Act, with the exception of a few components deemed sensitive such as encryption routines). Basically, VHA runs VistA on two platforms DSM (under OpenVMS) and Cach� (under NT). Both of these are commercial products. There are some efforts in the hardhats to port VistA to a free MUMPS implementation, but it won't run on these platforms "out of the box." Generally, VistA uses only ANSI standard MUMPS (the exception being Kernel which is intended to provide standard libraries that encapsulate any platform dependencies). I haven't been involved in the effort to port VistA to these new platforms, but my understanding is that the main issues have to do with incomplete implementations of the standard. === Gregory Woodhouse <[EMAIL PROTECTED]> Financial Product Line +1 415 744 6362 "Computer science is no more about computers than astronomy is about telescopes." -- E.W. Dijkstra -----Original Message----- From: Alvin B. Marcelo [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 11, 2000 1:58 PM To: [EMAIL PROTECTED] Subject: VistA requirements Just to get things straight: what do I need to run VistA in my hospital? operating system, persistence mechanism, etc... are all the components open source? alvin
