Well, analog computers don't have zero IPS, but rather a _quite_ high operations speed, but never imediate. Thy need some time to get a stable result - and getting this result is one operation In fact the only operation this machine does at all. so if the plugged euation needs lets say 1 ms to stabilize, the Computer has 1 kIPS. Analog computers get (if not mechanical) a rather low Zuse number (still way above any modern machine), since they usualy are of small footprint, not very heavy and not realy power consuming - One thing is the momory wich is up for discusion. I'd equal each amplifier as a bit ... Or as said before set the memory value as 1. Gruss H. -- VCF Europa 3.0 am 27./28. April 2002 in Muenchen http://www.vcfe.org/