HP-27S 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-27S
Display type	LCD
Display format	2 Line
FIXed number format	Yes
SCIentific number format	Yes
ENGineering number format	Yes
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-27S
Logic system	Algebraic
Stack levels	4*
Last x	Yes*
Undo	-
Precedence	Yes
Parentheses	Yes
Storage Addition (STO +)	Yes
Storage Arithmetic (STO +, −, ×, ÷)	Yes
Storage Exponentiation (STO ^)	Yes
Recall Arithmetic	-
Named variables	-
Multiple data types	-
Directories	-
Math	HP-27S
+, −, ×, ÷	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.)	Yes
Hyperbolic trig. (SINH, COSH etc.)	Yes
# of trig. modes (degrees, radians, grads)	2
Advanced Math	HP-27S
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-27S
Mean, standard deviation (# of variables)	2
Σ of n, x, x²	Yes
Σ of n, x, x², y	Yes
Σ of n, x, x², y, xy	Yes
Σ of n, x, x², y, y², xy	Yes
Σ of lists	Yes
Random number generator	Yes
Linear regression, estimate	Yes
Curve fitting	Yes
Correlation coefficient	Yes
Normal distribution	-
Factorial	Yes
Gamma	-
Combinations and permutations	Yes
Scientific and Time	HP-27S
Polar / rectangular conversions	Yes
Base conversions (2, 8, 10, 16)	Yes
Arithmetic in bases 2, 8 and 16	Yes
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	Yes
Hrs.min.sec arithmetic	-
Time of day clock	Yes
Timer	-
Dynamic calculations (timer × rate)	-
Alarms	Yes
Unit Conversions	HP-27S
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-27S
Number of payments (n)	Yes
Interest rate (i)	Yes
Present Value (PV)	Yes
Payment (PMT)	Yes
Future Value (FV)	Yes
Cash Flow Analysis	HP-27S
Net present value (NPV)	-
Internal rate of return (IRR)	-
Amortization	HP-27S
Accumulated Interest (ACC INT)	Yes
Balance (BAL)	Yes
Depreciation	HP-27S
Straight line (SL)	-
Sum of the years digits (SOYD)	-
Declining balance (DB)	-
Bonds and calendar functions	HP-27S
Bond price	-
Bond yield	-
Date arithmetic / calendar functions	Yes
Memory and Programming	HP-27S
Programming language(s)	-
RAM / Max # of variables or addressable registers	6.7K bytes / 10 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-27S
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-27S
Sounds	Yes
Self test	-
Hard case (in addition to soft case)	-
Additional Features	-
Batteries	3 SR 44
Length (inches)	5.85"
Width	3.15"
Height	0.6"
Weight (oz or lbs)	5 oz
Year of introduction	1988
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-27S

Display type

LCD

Display format

2 Line

FIXed number format

Yes

SCIentific number format

Yes

ENGineering number format

Yes

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-27S

Logic system

Algebraic

Stack levels

Last x

Yes*

Undo

Precedence

Yes

Parentheses

Yes

Storage Addition (STO +)

Yes

Storage Arithmetic (STO +, −, ×, ÷)

Yes

Storage Exponentiation (STO ^)

Yes

Recall Arithmetic

Named variables

Multiple data types

Directories

Math

HP-27S

+, −, ×, ÷

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.)

Yes

Hyperbolic trig. (SINH, COSH etc.)

Yes

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

Advanced Math

HP-27S

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-27S

Mean, standard deviation (# of variables)

Σ of n, x, x²

Yes

Σ of n, x, x², y

Yes

Σ of n, x, x², y, xy

Yes

Σ of n, x, x², y, y², xy

Yes

Σ of lists

Yes

Random number generator

Yes

Linear regression, estimate

Yes

Curve fitting

Yes

Correlation coefficient

Yes

Normal distribution

Factorial

Yes

Gamma

Combinations and permutations

Yes

Scientific and Time

HP-27S

Polar / rectangular conversions

Yes

Base conversions (2, 8, 10, 16)

Yes

Arithmetic in bases 2, 8 and 16

Yes

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

Yes

Hrs.min.sec arithmetic

Time of day clock

Yes

Timer

Dynamic calculations (timer × rate)

Alarms

Yes

Unit Conversions

HP-27S

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-27S

Number of payments (n)

Yes

Interest rate (i)

Yes

Present Value (PV)

Yes

Payment (PMT)

Yes

Future Value (FV)

Yes

Cash Flow Analysis

HP-27S

Net present value (NPV)

Internal rate of return (IRR)

Amortization

HP-27S

Accumulated Interest (ACC INT)

Yes

Balance (BAL)

Yes

Depreciation

HP-27S

Straight line (SL)

Sum of the years digits (SOYD)

Declining balance (DB)

Bonds and calendar functions

HP-27S

Bond price

Bond yield

Date arithmetic / calendar functions

Yes

Memory and Programming

HP-27S

Programming language(s)

RAM / Max # of variables or addressable registers

6.7K bytes /
10 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-27S

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-27S

Sounds

Yes

Self test

Hard case (in addition to soft case)

Additional Features

Batteries

3 SR 44

Length (inches)

5.85"

Width

3.15"

Height

0.6"

Weight (oz or lbs)

5 oz

Year of introduction

1988

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-27S notes:

Algebraic logic with a "history stack". LAST retrieved value above on stack.
To start the self test, with the calculator on, press and hold the fourth menu key (LN) and press the ON/CLR key. Pressing any key will step through a series of tests (including printing a copyright) until you see KBD. Then you must press each key from the upper left from left to right and then down until you see KBD OK. After another key, you'll see OK-27S-E. If there is a problem, you will see a FAIL message. To exit the test, at any point, press and hold the third menu key (e^x) key and then press the ON/CLR key. A continuous test (minus the keyboard test) can be started by holding the firth menu key (y^x)and pressing ON/C. Exit this test in the same way as the individual test.

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