HP HP-67

Appendix C
Improper Operations
If you attempt a calculation containing an improper operation—say,
division by zero—the calculator display will show . The
following are improper operations:
where x =0
wherey =0andx <0
where y < 0 and x is non-integer
where x <0
where x =0
where x <0
where x <0
where |x‘ is > 1
where lx] is >1
where x =0
wheren = 0
where n < 1
EEE§$afifln
@@E
a
BB, 6080, 50 8 0, 58 8 @, where magnitude of
number in storage register (n) would then be larger than
9.999999999 X 10%,
where y = 0
CE2 @ where ABS (INT I) > 9
(@ where ABS (INT I) > 25
@ where ABS (INT I) > 25
ENE0O.606 0,600 0,5 8 [, where ABS (INTI) >
25, or where magnitude of number in storage register addressed by I
would be larger than 9.999999999 X 10°°.
320