RTP makes very reliable IO equipment for use in plants and laboratories. The Universal controller can be connected to a wide variety of computers using a module that plugs into the bus of the computer. One can also use an ethernet module or a module with a serial line (DIOC) I did a number of projects where I used DIOCs to couple it with PDP-11 computers, a Foxboro SMS computer and a GE Mark V. The great advantage being that when you change the type of computer you use, the plant wiring can be left unchanged. The great reliability of the RTP stuff ment that even when the computer is worn out, you can leave the RTP in place. Factory experience was that maintenance people completely forgot the RTP gear because it practically never stopped working and bewilderment set in when it once in a while failed. Very convenient is also that after 10 or more years it was perfectly possible to get spare parts. RTP is not for planned obsolescence I would not be surprised at all if spare parts still could be obtained for your stuff. Philipp Hachtmann wrote: > Hello, > > I am looking for information about IO controllers made by "Computer > Products Inc., Fort Lauderdale". > > The controllers are normally named "RTP XXXX/XX" where X are numbers. > The company who produced these controllers (now RTP corp. > www.rtpcorp.com) is still around and uses its "RTP BUS". But they don't > give me any information about the bus.