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HP 10B and 10BII Calculators - Product Comparison

Introduction
The following tables outline the differences between the HP 10B and HP 10BII business calculators.
Software differences
The following table lists the software differences between the HP 10B and HP 10BII calculators.
Feature
HP 10BII calculator
HP 10B calculator
User registers
10 Separate Registers
15 registers shared with cash flows and statistics
Cash Flows
15 separate cash flows
15 cash flows shared with user registers and statistics.
Statistical Variables
6 separate registers
6 registers shared with Cash flows and user registers.
Press: 12 + =
24
12
Press: 12 / =
1
12
Press: 12 * =
144
12
Press: 12 - =
0
12
displaying 0.00051 to two decimal places
0.0005
0.001
Rounding policy if the number to be displayed is zero but the actual number is non-zero (as in the case above)
Show the most significant digit rounded by the other digits. (0.00055 shows 0.0006
Keep rounding the number to more and more decimal places until a non-zero answer is shown.
SWAP Key
Swaps only when there is something to swap with.
Swaps with INPUT even though nothing may be in INPUT.
Press 12 INPUT +
12, INPUT and PEND is displayed
12, PEND is displayed; INPUT has disappeared.
Press 12 + 3K N =
18
15
Press 12 + 3K N = =
21
18
Press -9.99999999E499 Yx 1 = [DISP] =
999999999999
999999999997
Press 0.00E gives
1E
1.E
Press Sum - with N = 0 allows N to be negative.
No
Yes
Underflow
Displayed at all times when occurring
Only Displayed during TVM and IRR calculations
Amortization Order
Period, Principle, Interest, Balance
Period, Interest, Principle, Balance.
Press [AMORT] [=] [C]
Clears the display
Display remains, press [C] again to clear.
Ambiguous IRR or TVM case
Not Found
Error - Soln
A Statistical Calculation Returns two values
STAT annunciator is shown.
":" is shown and second number placed into INPUT.
Using [STO] for storing cash flows
Pressing [STO][CFJ][0] …[9] [STO][CFJ][.][0]…[.][4] stores the number on the screen directly into that cash flow. (0-9)(10-14). [STO][CFJ][+] stores into the next cash flow (looping if necessary). [STO][CFJ][-] stores into the previous cash flow, looping where necessary. [STO][CFJ][CFJ] stores into the current cash flow
Store into particular cash flows by modifying the user registers
Using [RCL] to recall cash flows
Press [RCL][CFJ][0] …[9] [RCL][CFJ][.][0]…[.][4] displays the number on the screen from that Cash flow. (0-9)(10-14). [RCL][CFJ][+] recalls the next cash flow (looping if necessary). [RCL][CFJ][-] recalls the previous cash flow, looping where necessary. [RCL][CFJ][CFJ] recalls the current cash flow.
RCL a user register then RCL CFJ runs through cfj list. There is no looping.
IRR causes calculator to endlessly iterate.
Some situations have been rectified so that the calculator returns a message/error.
Gets caught in an endless loop.
Changing Statistical summary variables
They are only changed by the calculator; the user cannot modify the values
The user can change the values in the user registers.
Self Tests
Only one simple test
Streaming and interactive, which tests keyboard.
Hardware differences
This table lists the hardware differences between the HP 10B and HP 10BII calculators.
Feature
HP 10BII calculator
HP 10B calculator
Input Key
Single Key Width
Double Key Width
Two Shift Keys (1 for stats)
Yes
Single Shift
On/Off
Separate Key
Shared with C
Errors
Displayed on Annunciators
Displayed using the 7-segment 12-digit display.
Annunciators
20 Annunciators, to handle cash flows, amortization, errors over and above the 10B
5 Annunciators.
Keys
Angled to show shifted function on Actual Key
Flat. Shifted functions are printed above the Key.
Statistical Variables
Attached to corresponding Key
Floating between Keys
TVM.
Top Five, embolden keys, highlighting the task of the 10BII
Keys are just one of many.
Cost Price Margin Markup
Famous Four, embolden keys, highlighting the task of the 10BII
Keys are just one of many.
Margin Markup Keys
Two separate keys. (Software behavior is the same in that they share the same register.)
One Key with a shifted function.

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