I've got several HP 9825A calculator/computers that I don't need. In checking out the first one, I get an error code 30 which according to the quick reference means special function not defined. Anyone know what this actually means? As soon as I get them checked out and to a known condition, I'll go ahead and put them up on the VCGM, and start them at around $50 - $75 depending on condition. I've just got WAY too much stuff around here, and I don't expect to ever really want to play with these. BTW, I only get the digest, so I'll see any response(s) on the next digest. Thanks! Marvin