HP-18C Features

Features in optional ROMs are listed as Option. Features in HP mag card or tape Application Pacs are listed as +. Other software is not included.
Display and Keyboard	HP-18C
Display type	LCD
Display format	4 Line
FIXed number format	Yes
SCIentific number format	-
ENGineering number format	-
STanDard / ALL number format	Yes
Alpha messages and prompts	Yes
Softkeys labeled by mag. card or overlay	-
Softkeys labeled by display menus	Yes
Softkeys with neither labeling system	-
Status annunciators	Yes
Redefinable keyboard	-
Logic	HP-18C
Logic system	Algebraic
Stack levels	4
Last x	Yes*
Undo	-
Precedence	-*
Parentheses	Yes
Storage Addition (STO +)	Yes
Storage Arithmetic (STO +, −, ×, ÷)	Yes
Storage Exponentiation (STO ^)	Yes
Recall Arithmetic	-
Named variables	-
Multiple data types	-
Directories	-
Math	HP-18C
+, −, ×, ÷	Yes
1/x	Yes
√	Yes
x²	Yes
LOG x	Yes
10^x	Yes
LN x	Yes
e^x	Yes
y^x	Yes
π	Yes
%	Yes
% change	Yes
INTeger truncation and ABSolute value	Yes
Trigonometric functions (SIN, COS etc.)	-
Hyperbolic trig. (SINH, COSH etc.)	-
# of trig. modes (degrees, radians, grads)	-
Advanced Math	HP-18C
Solver / root finder	Yes
Numeric integration	-
Complex numbers	-
Matrix operations	-
Matrix writer	-
Equation writer	-
Symbolic operations	-
Fractions	-
Plotting and graphics (display)	-
Plotting and graphics (printer / plotter)	-
Statistical	HP-18C
Mean, standard deviation (# of variables)	1
Σ of n, x, x²	-
Σ of n, x, x², y	-
Σ of n, x, x², y, xy	-
Σ of n, x, x², y, y², xy	-
Σ of lists	Yes
Random number generator	-
Linear regression, estimate	Yes
Curve fitting	Yes
Correlation coefficient	Yes
Normal distribution	-
Factorial	Yes
Gamma	-
Combinations and permutations	-
Scientific and Time	HP-18C
Polar / rectangular conversions	-
Base conversions (2, 8, 10, 16)	-
Arithmetic in bases 2, 8 and 16	-
Bit operations (AND, OR, XOR, ...)	-
Selectable word size (1-64 bits)	-
Selectable complement mode (1's, 2's, unsigned)	-
Decimal hrs / hrs.min.sec. conversions	-
Hrs.min.sec arithmetic	-
Time of day clock	Yes
Timer	-
Dynamic calculations (timer × rate)	-
Alarms	Yes
Unit Conversions	HP-18C
Centimeters / inches	-
Millimeters / inches	-
Meters / feet	-
Kilograms / pounds (mass)	-
Newtons / pounds (force)	-
British thermal units / joules	-
Liters / gallons	-
° Celsius / ° Fahrenheit	-
Other	-
User-defined units	-
Time Value of Money	HP-18C
Number of payments (n)	Yes
Interest rate (i)	Yes
Present Value (PV)	Yes
Payment (PMT)	Yes
Future Value (FV)	Yes
Cash Flow Analysis	HP-18C
Net present value (NPV)	Yes
Internal rate of return (IRR)	Yes
Amortization	HP-18C
Accumulated Interest (ACC INT)	Yes
Balance (BAL)	Yes
Depreciation	HP-18C
Straight line (SL)	-
Sum of the years digits (SOYD)	-
Declining balance (DB)	-
Bonds and calendar functions	HP-18C
Bond price	-
Bond yield	-
Date arithmetic / calendar functions	Yes
Memory and Programming	HP-18C
Programming language(s)	-*
RAM / Max # of variables or addressable registers	1200 bytes / 4 registers
Max # of program steps	-
RAM / Max vars or regs with full optional RAM	-
Max # of prog steps with full optional RAM	-
Merged program steps	-
Manual register / program memory allocation	-
Automatic register / program memory allocation	-
Overlapped register and program memory	-
Continuous memory	Yes
Flags	-
Conditional tests	-
Subroutine levels	-
Indexed looping (increment by +/- 1, end at 0)	-
Indexed looping (choice of increment and end)	-
Multiple index / loop registers	-
Line number addressing	-
Branching by relative line number	-
Global program label addressing	-
Local program label addressing	-
Indirect / computed addressing and control	-
Multiple indirection registers	-
Pause	-
Alpha messages and prompts in programs	-
Alpha program listings	-
Alpha string manipulation	-
Program step insert / delete	-
I/O and Expansion Features	HP-18C
ROM modules	-
RAM modules or expansion option	-
General expansion slots / connector	-
Magnetic card reader/writer	-
Tape drive	-
Disk drive	-
Upgradeable firmware	-
Optical wand	-
Serial port	-
Infrared input	-
Infrared output	Yes
Printer	Option
Networking	-
Other	-
General	HP-18C
Sounds	Yes
Self test	Yes
Hard case (in addition to soft case)	-
Additional Features	-
Batteries	3 N cells
Length (inches)	6.2"
Width	3.75"
Height	0.7"
Weight (oz or lbs)	8oz
Year of introduction	1986
Features in optional ROMs are listed as Option. Features in HP mag card or tape Application Pacs are listed as +. Other software is not included. Unlim means limited only by available memory.

Features in optional ROMs are listed as Option.
Features in HP mag card or tape Application Pacs are listed as +.
Other software is not included.

Display and Keyboard

HP-18C

Display type

LCD

Display format

4 Line

FIXed number format

Yes

SCIentific number format

ENGineering number format

STanDard / ALL number format

Yes

Alpha messages and prompts

Yes

Softkeys labeled by mag. card or overlay

Softkeys labeled by display menus

Yes

Softkeys with neither labeling system

Status annunciators

Yes

Redefinable keyboard

Logic

HP-18C

Logic system

Algebraic

Stack levels

Last x

Yes*

Undo

Precedence

Parentheses

Yes

Storage Addition (STO +)

Yes

Storage Arithmetic (STO +, −, ×, ÷)

Yes

Storage Exponentiation (STO ^)

Yes

Recall Arithmetic

Named variables

Multiple data types

Directories

Math

HP-18C

+, −, ×, ÷

Yes

1/x

Yes

√

Yes

x²

Yes

LOG x

Yes

10^x

Yes

LN x

Yes

e^x

Yes

y^x

Yes

% change

Yes

INTeger truncation and ABSolute value

Yes

Trigonometric functions (SIN, COS etc.)

Hyperbolic trig. (SINH, COSH etc.)

# of trig. modes (degrees, radians, grads)

Advanced Math

HP-18C

Solver / root finder

Yes

Numeric integration

Complex numbers

Matrix operations

Matrix writer

Equation writer

Symbolic operations

Fractions

Plotting and graphics (display)

Plotting and graphics (printer / plotter)

Statistical

HP-18C

Mean, standard deviation (# of variables)

Σ of n, x, x²

Σ of n, x, x², y

Σ of n, x, x², y, xy

Σ of n, x, x², y, y², xy

Σ of lists

Yes

Random number generator

Linear regression, estimate

Yes

Curve fitting

Yes

Correlation coefficient

Yes

Normal distribution

Factorial

Yes

Gamma

Combinations and permutations

Scientific and Time

HP-18C

Polar / rectangular conversions

Base conversions (2, 8, 10, 16)

Arithmetic in bases 2, 8 and 16

Bit operations (AND, OR, XOR, ...)

Selectable word size (1-64 bits)

Selectable complement mode (1's, 2's, unsigned)

Decimal hrs / hrs.min.sec. conversions

Hrs.min.sec arithmetic

Time of day clock

Yes

Timer

Dynamic calculations (timer × rate)

Alarms

Yes

Unit Conversions

HP-18C

Centimeters / inches

Millimeters / inches

Meters / feet

Kilograms / pounds (mass)

Newtons / pounds (force)

British thermal units / joules

Liters / gallons

° Celsius / ° Fahrenheit

Other

User-defined units

Time Value of Money

HP-18C

Number of payments (n)

Yes

Interest rate (i)

Yes

Present Value (PV)

Yes

Payment (PMT)

Yes

Future Value (FV)

Yes

Cash Flow Analysis

HP-18C

Net present value (NPV)

Yes

Internal rate of return (IRR)

Yes

Amortization

HP-18C

Accumulated Interest (ACC INT)

Yes

Balance (BAL)

Yes

Depreciation

HP-18C

Straight line (SL)

Sum of the years digits (SOYD)

Declining balance (DB)

Bonds and calendar functions

HP-18C

Bond price

Bond yield

Date arithmetic / calendar functions

Yes

Memory and Programming

HP-18C

Programming language(s)

RAM / Max # of variables or addressable registers

1200 bytes /
4 registers

Max # of program steps

RAM / Max vars or regs with full optional RAM

Max # of prog steps with full optional RAM

Merged program steps

Manual register / program memory allocation

Automatic register / program memory allocation

Overlapped register and program memory

Continuous memory

Yes

Flags

Conditional tests

Subroutine levels

Indexed looping (increment by +/- 1, end at 0)

Indexed looping (choice of increment and end)

Multiple index / loop registers

Line number addressing

Branching by relative line number

Global program label addressing

Local program label addressing

Indirect / computed addressing and control

Multiple indirection registers

Pause

Alpha messages and prompts in programs

Alpha program listings

Alpha string manipulation

Program step insert / delete

I/O and Expansion Features

HP-18C

ROM modules

RAM modules or expansion option

General expansion slots / connector

Magnetic card reader/writer

Tape drive

Disk drive

Upgradeable firmware

Optical wand

Serial port

Infrared input

Infrared output

Yes

Printer

Option

Networking

Other

General

HP-18C

Sounds

Yes

Self test

Yes

Hard case (in addition to soft case)

Additional Features

Batteries

3 N cells

Length (inches)

6.2"

Width

3.75"

Height

0.7"

Weight (oz or lbs)

8oz

Year of introduction

1986

Features in optional ROMs are listed as Option.
Features in HP mag card or tape Application Pacs are listed as +.
Other software is not included.

Unlim means limited only by available memory.

HP-18C notes:

The calculator didn't have precedence but the solver did.
The Solver allowed conditional expressions which effectively provided limited programmability.
LAST retrieved value from history stack.
Press and hold ON and press the fourth menu key from the left. The calculator will beep and display a series of vertical bars. You can now press any key to step through a series of tests (each with a different display - one blank.) Once the calculator displays KEYBOARD TEST, you must press each key on the alpha (left) keyboard starting from the upper left and proceeding from left to right and then down. You will hear a beep on each keystroke. After the alpha keyboard, do the same with the main (right) keyboard. When you are finished, you will see: OK-18C-E. The message FAIL will be displayed if there is a problem or if you press keys in the wrong order. By pressing and holding ON and pressing the fifth menu key, you can put the calculator into a continuous self-test (minus the keyboard test.) To exit the continuous test press and hold ON and press the third menu key.

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