Kirk, I have one sitting in my dining room! It's one of the HP 9000 200 series computers (9826 aka 9000 216, 9836 aka 9000 236, 9000/220, etc). They were replaced with the 9000 300 series and those have been replaced in turn. They date to the early '80s and use a 10 Mhz 68000 CPU. Like most HPs, the hardware and software are both unique to them. Languages for them included disk based BASIC, Pascal and something called HPL. HP offered a lot of different cards for them including BASIC and Pascal in ROM (both very rare), 16 bit parallel intrfaces called GPIO (General Purpose I/O), several different HP-IB interfaces, RS-232 interfaces and lots of LAN type cards. Memory boards were available in 64K, 256K, 1 Meg and 4 Meg sizes. 256 K are by far the most common. When it boots, it will list the installed memory and devices. In case, you haven't guessed everything is interfaced via HP-IB. HP-IB allows several buses per system and up to 32 devices per bus. Each item on a bus has a "select code" between 1 and 32. When the system boots you will see things like "98622 at 12". That means that it found a HP 98622 board at address 12 on the internal HP-IB bus. The 98622 is a GPIO board. Look at the covers on the back. You'll see the part numbers on them and usually they will have the select code marked on them as well. There are two columns of eight expansion slots on the back. BUT you will only see four metal covers in each column! Some cards do not have a metal plate and some do. You may remove a plate with it's attached card and find another card under the same plate but not attached to it. ( I hope that makes sense.) Memory boards do not have metal covers. Interface boards do. Video: Yeap, typical HP, it uses a non-standard video output. I doubt you'll find a monitor that will work on it except the proper HP one. If you send me the part number from the video card I'll tell you which monitors will work with it. More about HP-IB: There sould be a connector for an external HP-IB bus on the back. It will probably be on the same card as the keyboard connection. It will look like a Centronics connector (the same type as a parallel printer uses) except it will only use 24 pins. And before I get flamed, yes I know it's actually an Amphenol connector but in the computer industry they're known as Centronics connectors because that's what Centronics used and they made most of the early printers. These systems did not have any internal disk drives, they were all external and were connected via HP-IB, as were the printers. (You could connect a serial printer to a RS-232 port, but I've never seen it done.) The keyboard interface is also non-standard. There are two different HP key baords that can be used on it but I don't have the numbers handy. If you decide to get rid of it, I'd like to have it. I have a 9000 /220, two 9826s and a 9836. Joe Joe At 02:00 AM 1/2/98 -0600, you wrote: