[Spock@SAMSON.CADR.DIALNET.SYMBOLICS.COM: Floating-point round-off problems.]

[Mac Michaels <mac%cadillac.cad.mcc.com@MCC.COM>]

+>  Date: Thu, 10 Aug 89 08:00 PDT
+>  From: Spock@SAMSON.CADR.DIALNET.SYMBOLICS.COM (Mr. Spock)
+>  
+>  Does anyone have a hack to correct for the losing floating-point math on
+>  these Symbolics machines?
+>  
+>  Consider:
+>  
+>      (- 6 5.9) returns -> 0.099999905 instead of 0.1
+>  
+>  Thanks,
+>  --Mark Alexander

It looks like a problem common to more than Symbolics.  

Austin Kyoto Common Lisp on a Sun 4-110 returns:

0.09999999999999964

Extension Language Kit (a superset of Scheme) on a Sun 3 returns:

0.0999999999999996


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