Hewlett Packard Journal
Technical Information from the Laboratories of Hewlett-Packard Company
		     Calculator-Related Articles

	       data courtesy of Rick Furr,

June 1972 Vol. 23 No. 10

pages 2-9
	The 'Powerful Pocketful': An Electronic Calculator Challenges
	  the Slide Rule
	- This 9 ounce, battery-powered scientific calculator, small
	  enough to fit in a shirt pocket, has logarithmic,
	  trigonometric, and exponential functions and computes
	  answers to 10 significant digits.
	by T.M. Whitney, F. Rode' and C.C Tung

page 5
	Operational Stacks and Reverse Polish Notation

page 7
	How the HP-35 Compares with the Slide Rule

pages 10-11
	Algorithms and Accuracy in the HP-35
	- A lot goes into that little machine when it's computing a 
	  transcendental function.
	by D.S. Cochran

pages 12-13
	Packaging the Pocket Calculator
	- The industrial design of the HP-35 was of primary
	  importance, often taking precedence over electrical
	by Edward T. Liljenwall

May 1973 Vol. 24 No. 9

pages 2-8
	A Pocket-Sized Answer Machine for Business and Finance
	- This new 9 ounce, battery-powered calculator replaces most
	  commonly used financial tables, such as compound interest, 
	  annuities, and bonds.  It's also a 200 year calendar.
	by W.L. Crowley and F. Rode'

page 5
	Examples of HP-80 Solutions

page 8
	Appendix A -- A Typical HP-80 Algorithm
	Appendix B -- Principal HP-80 Equations

pages 18-24
	A Quiet, Low-Cost, High-Speed Line Printer
	- This thermal printer writes 80 column lines at 250 lines per
	  minute.  Developed primarily for the 9830A Calculator, it's a 
	  general-purpose printer that's easily interfaced to a variety of 
	by Dick B. Barney and James R. Drehle

page 23
	The Thermal Printhead Story

May 1974 Vol. 25 No. 9

pages 2-6
	The "Personal Computer:" A Fully Programmable Pocket
	- This 11 ounce battery-powered marvel has the computing power
	  of an advanced scientific pocket calculator and is
	  programmable as well, so it can adapt to any number of
	  specialized uses.
	by C.C. Tung

page 4
	Self Clocking Two-Track Recording Technique

pages 8-14
	Programming the Personal Computer
	- Wherein are revealed the functions of the keys, how problems
	  are solved, and a bit of what goes on inside.
	by R.K. Stockwell

pages 15-17
	Designing a Tiny Magnetic Card Reader
	- Here's how it was designed and how it works.
	by R.B. Taggart

pages 18-20
	Testing the HP-65 Logic Board
	- The board and it's automatic test system are designed for
	  rapid production testing and troubleshooting.
	by Kenneth W. Peterson

November 1975 Vol. 27 No. 3

pages 2-7
	Three New Pocket Calculators: Smaller, Less Costly, More
	- HP's second-generation pocket calculator family now includes
	  a basic scientific model, a programmable scientific model,
	  and a business model.
	by Randall B. Neff and Lynn Tillman

page 6
	An Example of HP-25 Programming

pages 8-12
	Inside the New Pocket Calculators
	- The HP-21 type of calculator isn't just a stripped-down
	  version of older HP pocket calculators, but an entirely new
	by Michael J. Cook, George M. Fitcher, and Richard E. Whicker

page 10
	Packaging the New Pocket Calculators
	by Thomas A. Hender

May 1976 Vol. 27 No. 9

pages 2-15
	New CRT Terminal Has Magnetic Tape Storage for Expanded Capability 
	- Two built-in tape drives make the terminal a stand-alone data 
	  station.  User benefits are reduced on-line time costs, lower 
	  line charges in remote operations, and greatly lessened demand on 
	  computer resources.
	by Robert G. Norman, Richard L. Smith, and Louis A. Witkin

pages 6-7
	Mini Data Cartridge: A Convincing Alternative for Low-Cost, 
	Removable Storage
	by Alan J. Richards (Calculator Products Division)

page 12
	Mini-Cartridge Drive Mechanism

June 1976 Vol. 27 No. 10

pages 2-14
	Third-Generation Programmable Calculator Has Computer-Like
	- A new programming language, HPL, helps the user apply the many 
	  technological advances in the personal computing machine to a 
	  wide variety of computation and control problems.
	by Donald E. Morris, Chris J. Christopher, Geoffrey W. Chance, 
	and Dick B. Barney

page 5
	9825a Product Design

page 13
	9825A Cartridge Tape Unit

pages 15-18
	High-Performance NMOS LSI Processor
	by William D. Eads, David S. MaitLand

pages 24-32
	Mid-range Calculator Delivers More Power at Lower Cost
	- Its design takes advantage of the latest technology, principally 
	  a single-chip microprocessor.
	by Douglas M. Clifford, F. Timothy Hickenlooper, and A. Craig 

November 1976 Vol. 28 No. 3

pages 2-8
	A Pair of Program-Compatible Personal Programmable
	- One is a small, portable printing calculator and the other
	  is a hand-held version without a printer.  Both versions
	  feature a "smart" magnetic card reader, and each can run the
	  other's programs.
	by Peter D. Dickinson and William E. Egbert

pages 9-18
	Programmable Scientific Calculator Has Built-In Printer
	- It's the first of a new generation of small, portable,
	  printing calculators that operate on rechargeable batteries
	  or line current.
	by Bernard E. Musch and Robert B. Taggart

pages 16-17
	The New Accuracy:  Making 2^3 = 8
	by Dennis W. Harms

May 1977 Vol. 28 No. 9
Algorithms I

pages 22-24
	Personal Calculator Algorithms I:  Square Roots
	- A detailed explanation of the algorithm used by HP hand-held 
	  calculators to compute square roots.
	by William E. Egbert

June 1977 Vol. 28 No. 10
Algorithms II

pages 17-20
	Personal Calculator Algorithms II: Trigonometric Functions
	- A detailed explanation of the algorithms used by HP
	  hand-held calculators to compute sine, cosine, and tangent.
	by William E. Egbert

October 1977 Vol. 29 No. 2

pages 22-28
	Printing Financial Calculator Sets New Standards for Accuracy
	and Capability
	- This briefcase-portable calculator has several new functions
	  and is exceptionally easy to use.  Most important, the user
	  need not be concerned about questions of accuracy or
	  operating limits.
	by Roy E. Martin

November 1977 Vol. 29 No. 3
Algorithms III

pages 22-23
	Personal Calculator Algorithms III: Inverse Trigonometric
	- A detailed description of the algorithms used in
	  Hewlett-Packard hand-held calculators to compute arc sine,
	  arc cosine, and arc tangent.
	by William E. Egbert

pages 26-32
	An NMOS Process for High-Performance LSI Circuits
	- Fast 16-bit microprocessors, 16k read-only memories, and a
	  variety of special-purpose random-logic chips are the result of 
	  an NMOS process that produces high-performance large-scale 
	  integrated circuits.
	By Joseph E. DeWeese and Thomas R. Ligon

pages 30-31
	Application of the NMOS-II Process

December 1977 Vol. 29 No. 4

pages 2-10
	Wrist Instrument Opens New Dimension in Personal Information
	- It's a digital electronic wristwatch, a personal calculator,
	  an alarm clock, a stopwatch, a timer, and a 200-year
	  calendar, and its functions can interact to produce
	  previously unavailable results.
	by Andre' F. Marion, Edward A. Heinsen, Robert Chin,
	  and Ben E. Helmso

April 1978 Vol. 29 No. 8
Algorithms IV

pages 2-10
	A Highly Integrated Desktop Computer System
	- System 45, the new flagship of the HP 9800 Series, gives the user 
	  unprecedented power in a single compact unit.  It offers advanced 
	  capabilities in program documentation. string and matrix 
	  operations, subprograms, program linking, tracing, formatted 
	  output, mass storage, and graphics
	by William D. Eads and Jack M. Walden

pages 11-21
	System 45 Hardware Design
	by John C. Keith, Louis T. Schulte, and Ansel K. Vogen

pages 14-15
	System 45 Product Design
	by Ray J. Cozzens

page 20
	System 45 Tape Control System
	by Richard Kochis

page 21
	System 45 Power Supply
	by Dick B. Barney

pages 22-28
	Advanced Thermal Page Printer Has High-Resolution Graphics 
	- This optional System 45 built-in peripheral quietly outputs 
	  program listings or hard copies of anything on the CRT display.
	by Ray J. Cozzens

pages 25-26
	New Printhead Technology Developed for System 45
	by Eugene R. Zeller

pages 29-32
	Personal Calculator Algorithms IV: Logarithmic Functions
	- A detailed description of the algorithms used in
	  Hewlett-Packard hand-held calculators to compute logarithms.
	by William E. Egbert

May 1979 Vol 30 No. 5

pages 11-12
	Extending Possibilities in Desktop Computing
	- This midrange computer's large memory capacity, two languages 
	  (enhanced BASIC and assembly language). low radiated 
	  interference, and powerful input/output facilities suit it 
	  especially well for computation, control, and data acquisition 
	by Sandy L. Chumbley

pages 13-15
	Processor Enhancements Expand Memory
	by Damon R. Ujvarosy and Dyke T. Shaffer

pages 16-17
	Designing to Meet Electromagnetic Interface Requirements
	by John C. Backer

pages 18-20
	Assembly Programming Capability in a Desktop Computer
	by Robery M. Hallissy

December 1979 Vol. 30 No. 12

pages 20-26
	Personal Calculator Has Key to Solve Any Equation f(x) = 0
	- The HP-34C is the first handheld calculator to have a
	  built-in numerical equation solver. That's why one of its
	  keys is labeled SOLVE.
	by William M. Kahan

page 23
	Why is Equation Solving Provably Impossible?
	"The merely Difficult, we do immediately; the impossible will 
	take slightly longer." Old British naval maxim.

March 1980 Vol. 31 No. 3

pages 3-12
	Powerful Personal Calculator System Sets New Standards
	- Customize this advanced new handheld calculator by plugging
	  in extra memory, a magnetic card reader, a printer, and
	  application modules.  You can reconfigure the keyboard, too.
	by Bernard E. Musch, John J. Wong, and David R. Conklin

page 5
	Using USER Mode

page 7
	Packaging the HP-41C
	- The liquid crystal display made it interesting for the
	  package designers.
	by Gerald W. Steiger

pages 12-15
	Card Reader Offers Compatibility and Expanded Capability
	- More powerful and useful than its predecessors, the HP-41C
	  card reader can read cards written by earlier HP personal
	by David J. Lowe and Patrick V. Boyd

pages 15-20
	Evolutionary Printer Provides Significantly Better Performance
	- As the power of a calculator increases, so must the
	  abilities of its printer.
	by Roger D. Quick and Donald L. Morris

pages 20-22
	Bulk CMOS Technology for the HP-41C
	- This integrated circuit process has many characteristics
	  that contribute to long battery life in a calculator.
	by Norman L. Johnson and Vijay V. Marathe

pages 22-24
	The First HP Liquid Crystal Display
	- LCD advantages include low voltage and power requirements
	  and good visibility in strong light.
	by Craig Maze

pages 25-26
	High Density and Low Cost with Printed Hybrid Technology
	- Silicon integrated circuit chips are mounted directly onto
	  printed circuit boards to save space and cost.
	by James H. Fleming and Robert N. Low

July 1980 Vol. 31 No. 7

pages 3-6
	A New World of Personal/Professional Computation
	- Now, an inexpensive computer system with integral display, mass 
	  storage, hard copy, and graphics capability is available for 
	  personal use by the technical professional or first-time computer 
	by Todd R. Lynch

pages 7-13
	Adding I/O Capability to the HP-85
	- With the implementation of I/O features, the capabilities of a 
	  self contained personal computer system ate expandable to control 
	  instruments, add on more powerful peripherals, and even talk to 
	  other computers.
	by John H. Nairn, Tim I. Mikkelsen, and David J. Sweetser

page 13
	Using HP-85 I/O Capabilities
	by Tim Mikkelsen

pages 14-18
	A Compact Tape Transport Subassembly Designed for Reliability
	  and Low Cost
	by Douglas J. Collins and Brian G. Spreadbury

pages 19-20
	A High-Quality CRT Display for a Portable Computer
	by James F. Bausch

pages 22-25
	A Compact Thermal Printer Designed for Integration into a
	  Personal Computer
	by Clement C. Lo and Ronald W. Keil

page 24
	An Efficient Power Supply for the HP-85
	by Jim Bausch

pages 26-27
	Enhanced BASIC Language for a Personal Computer
	by Nelson A. Mills, Homer C. Russell, and Kent R. Henscheid

page 28
	Random Number Generation
	by Homer Russell

page 30
	Fast Integer Processing
	by Homer Russell

August 1980 Vol. 31 No. 8

pages 23-32
	Handheld Calculator Evaluates Integrals
	- The HP-34C is the first handheld calculator to have a key
	  that performs numerical integration almost automatically.
	  It may change your attitude towards what used to be regarded
	  as a dreary tedious task.
	by William M. Kahan

January 1981 Vol. 32 No. 1
Bar Code

pages 3-10
	Handheld Scanner Makes Reading Bar Codes Easy and Inexpensive
	- This lightweight wand contains the light source,
	  reflected-light sensor, and digital signal shaping circuitry
	  needed for scanning bar-code patterns reliably.
	by John J. Uebbing, Donald L Lubin, and Edward G. Weaver, Jr.

pages 7-8
	What is a Bar Code?

pages 11-14
	Reading Bar Codes for the HP-41C Programmable Calculator
	- A new accesory for HP's most powerful handheld calculator
	  quickly enters data and programs from printed bar code.
	by David R. Conklin and Thomas L. Revere III

December 1982 Vol. 33 No. 12

pages 16-18
	Controlling a Graphics Plotter with a Handheld Programmable
	- The plotter is the 7470A.  The calculator is the HP-41C.
	by Robert M. Miller and Randy A. Coverstone

January 1983 Vol. 34 No. 1

pages 3-10
	HP-IL:  A Low-Cost Digital Interface for Portable Applications
	- The Hewlett-Packard Interface Loop is a bit-serial interface
	  bringing many capabilities formerly reserved for much larger
	  computer systems to the growing repertoire of portable
	  computers and handheld calculators.
	by Roger D. Quick and Steven L. Harper

page 7
	How Fast is the HP-IL?
	by Steve Harper

page 8
	HP-IL Interconnect System
	by James H. Fleming

pages 11-16
	The Electronics Interface for the Hewlett-Packard Interface Loop
	- This low-cost, low power serial interface uses two-wire
	  cables, a three-level code, a CMOS IC, and small pulse
	by Carl J. Landsness

pages 16-22
	A CMOS Integrated Circuit for the HP-IL Interface
	- This IC, available to OEM designers, makes it easy to add
	  HP-IL capability to a product.
	by Steven L. Harper
pages 23-29
	CMOSC:  Low-Power Technology for Personal Computers
	- To meet the growing need for integrated circuits with more
	  functions and lower power consumption, an improved CMOS
	  process has been developed at HP's Corvallis Division.
	by David E. Hackleman, Norman L. Johnson, Craig S. Lage,
	  John J. Vietor and Robert L. Tillman

page 28
	What is Latch-Up?	

February 1983 Vol. 34 No. 2
44468A DA/C Pac ROM

pages 16-19
	Low Cost Instrument Control: A New ROM for the HP-41 Handheld
	- Now HP-41 users can control instruments to measure and
	  analyze a variety of physical parameters on the bench or in
	  the field.
	by David L. Wolpert

May 1983 Vol. 34 No. 5

pages 17-14
	Compact Digital Cassette Drive for Low-Cost Mass Storage
	- This portable battery-operated unit uses minicassettes to store 
	  programs and data inexpensively for HP-IL systems.
	by William A. Buskirk, Charles W. Gilson, and David J. Shelley

pages 25-35
	Scientific Pocket Calculator Extends Range of Built in Functions
	- Matrix operations, complex number functions, integration,
	  and equation solving are only some of the numerous
	  preprogrammed capabilities of HP's latest scientific
	  calculator, the HP-15C.
	by Eric A. Evett, Paul J. McClellan, and Joseph P. Tanzini

pages 36-40
	A Pocket Calculator for Computer Science Professionals
	- This compact, yet powerful pocket calculator is designed for
	  technical professionals working in computer science and
	  digital electronics.  Boolean operations and bit
	  manipulation are some of its capabilities.
	by Eric A. Evett

page 37
	Real (Floating-Point) Format

pages 38-39
	Using the HP-16C

June 1983 Vol. 34 No. 6

pages 3-4
	A Portable Computer for Field, Office, or Bench Applications
	- This lightweight, battery-powered computer has features that make 
	  it an ideal tool for the traveling professional.
	by Donald E. Morris, Anthony S. Ridolfo, and Donals L. Morris

pages 5-7
	A Telephone Interface for HP-IL Controllers
	by Sidnee Snell and Brian G. Spreadbury

pages 8-9
	HP-IL and the HP-75 Portable Computer
	by Dennis C. York

pages 10-14
	High-Capacity Electronics Systems for a Compact, Battery-Operated 
	by Elizabeth Brooks, Robert J. Livengood, Rex C. Smith, and 
	Timothy F. Myers

page 12
	Packaging a Portable Computer
	by Lee S. Mason and Gary G. Lutnesky

page 14
	Electrostatic Discharge Protection for the HP-75
	by Gary J. May

pages 15-19
	Handpulled Magnetic Card, Mass Storage System for a Portable 
	by Kenneth R. Hoecker, James R. Schwartz, Francis A. Young, and 
	Dean R. Johnson

pages 20-23
	The HP-75 Production Card Recorder
	by David B. Patton

pages 24-26
	Integration of the HP-75's Handpulled Card Reader Electronics in 
	by Thomas J. Arnold and Billy E. Thayer

July 1984 Vol. 35 No. 7

pages 3-10
	A New Handheld Computer for Technical Professionals
	- This small computational tool functions both as a
	  BASIC-programmable computer and as an advanced scientific
	  calculator.  Equipped with the appropriate modules, it can
	  control instruments, store and retrieve data and programs,
	  perform complex number and matrix calculations, or be used
	  for software development.
	by Susan L. Wechsler

pages 6-7
	Calculator Mode for a Handheld Computer
	by Stephen Abell

pages 8-9
	HP-IL Interface Module for the HP-71B Computer
	by Nathan Zelle and Jackie Hunt
pages 10-13
	Soft Configuration Enhances Flexibility of Handheld Computer Memory
	- This technique allows the CPU to reassign a device's address
	  space and lets the user dedicate portions of RAM for
	  independent use.
	by Nathan Meyers

pages 14-17
	Custom CMOS Architecture for a Handheld Computer
	- A 4-bit CPU provides a 512K-byte address space and uses a
	  64-bit internal word size.
	by James P. Dickie

pages 17-21
	Packaging the HP-71B Handheld Computer
	- An innovative combination of standard manufacturing
	  techniques allows a very compact design.
	by Thomas B. Lindberg

pages 22-24
	Module Adds Curve-Fitting and Optimization Capabilities to the HP-71B
	- This plug-in ROM can fit data to a variety of built-in
	  functions or, given a function of up to 20 variables, finds
	  values of local minima or maxima.
	by Stanley M. Blascow, Jr. and James A. Donnelly
page 23
	An Optimization Example

pages 25-36
	ROM Extends Numerical Function Set of Handheld Computer
	- Full use of complex variables, integration, matrix algebra,
	  and polynomial root finding are some of the capabilities
	  provided by this plug-in module.
	by Laurence W. Grodd and Charles M. Patton

pages 37-40
	Plug-In Module Adds FORTH Language and Assembler to a Handheld
	- This ROM adds an alternative programming language and the
	  ability to define new BASIC keywords or FORTH primitives.
	by Robert M. Miller

March 1987 Vol. 38 No. 3

pages 38-40
	Viewpoints - A Viewpoint on Calculus
	- Presented to the Mathematics Panel of the American Association 
	  for the Advancement of Science on April 5, 1986.  Should the 
	  infinitesimal calculus be taught at all?
	by Zvonko Fazarinc

June 1987 Vol. 38 No. 6

pages 22-23
	Reader Forum - response
	by Alain Maruari

August 1987 Vol. 38 No. 8

pages 4-10
	A Handheld Business Consultant
	- The latest model in HP's line of calculators designed for
	  business and financial applications features a menu-driven
	  user interface for selecting any of its many built-in
	  functions or custom equations entered by the user.
	by Susan L. Wechsler
page 7
	Cash Flow Analysis Using the HP-18C

pages 8-9
	The Equation Solver Menu in the HP-18C
	by Paul Swadener

page 10
	History and Inspiration of the Solve Interface
	by Chris M. Bunsen
pages 11-17
	An Evolutionary RPN Calculator for Technical Professionals
	- Symbolic algebraic entry, an indefinite operation stack
	  size, and a variety of data types are some of the
	  advancements in HP's latest scientific calculator.
	by William C. Wickes

page 15
	HP-28C Plotting
	by Gabe L. Einstein

pages 17-20
	Mechanical Design of the HP-18C and HP-28C Handheld Calculators
	- A folding case and two keyboards enhance functionality while
	  reducing label clutter.
	by Judith A. Layman and Mark A. Smith
pages 21-25
	Symbolic Computation for Handheld Calculators
	- A special operating system was developed to allow processing
	  of a variety of data types from simple numbers to
	  alphanumeric expressions.
	by Charles M. Patton

pages 25-30
	A Multichip Hybrid Printed Circuit Board for Advanced Handheld
	- All of the electronics and the display are mounted on a
	  single 1.5-inch-by-3-inch board.
	by Bruce R. Hauge, Robert E. Dunlap, Cornelis D. Hoekstra,
	  Chong Num Kwee, and Paul R. Van Loan
pages 30-34
	An Equation Solver for a Handheld Calculator
	- A combination of direct and iterative solving algorithms is used.
	by Paul J. McClellan
pages 34-40
	Electronic Design of An Advanced Technical Handheld Calculator
	- Custom CPU, ROM, and display driver ICs are key elements.
	by Prestin D. Brown, Gregory J. May, and Megha Shyam

October 1987 Vol. 38 No. 10

pages 16-21
	An Infrared Link for Low-Cost Calculators and Printers
	- Since the sender on this unidirectional link gets no
	  feedback from the receiver, allowances must be made for
	  worst-case conditions.
	by Steven L. Harper, Robert S. Worsley, and Bruce A. Stephens

pages 21-23
	A Low-Cost Wireless Portable Printer
	- Based on a unidirectional infrared transmission path, this
	  small thermal printer can provide hard copy of HP-18C and
	  HP-28C calculations.
	by David L. Smith and Masahiko Muranami
pages 24-27
	Manufacturing State-of-the-Art Handheld Calculators
	- Robots and special fixturing help keep costs down.
	by Richard W. Riper

June 1991 Vol. 42 No. 3

pages 6-12
	The HP 48SX Scientific Expandable Calculator: Innovation and
	- Many of the features of this advanced handheld calculator
	  have evolved from its predecessors, the HP 41C and HP
	  28S. Others, such as its unit management system, are new.
	by William C. Wickes and Charles M. Patton

pages 13-21
	HP 48SX Interfaces and Applications
	- The HP 48SX scientific expandable calculator provides
	  support for multiple applications, both bulit-in and
	  externally developed, with customized user interfaces.  The
	  Equation-Writer and interactive plotting are two of the
	  built-in applications.
	by Ted W. Beers, Diana K. Byrne, Gabe L. Eisenstein,
	  Robert W. Jones and Patrick J. Megowan

pages 22-25
	HP Solve Equation Library Application Card
	- The card contains a library of 315 equations, the periodic
	  table of the elements, a constants library, a multiple
	  equation solver, a finance application, and engineering
	by Eric L. Vogel

pages 25-34
	Hardware Design of the HP 48SX Scientific Expandable Calculator
	- Leveraging an earlier design resulted in prototypes with 90%
	  production tooled parts only nine months after the start of
	  the project.  The HP 48SX includes an 8-line-by-22-character
	  super-twist nematic liquid crystal display, two expansion
	  ports for ROM or battery-backed RAM cards, and two I/O
	  ports: RS-232 and infrared.
	by Mark A. Smith, Lester S. Moore, Preston D. Brown,
	  James P. Dickie, David L. Smith, Thomas B. Lindberg,
	  and M. Jack Muranami

pages 27-28
	Industrial Design of the HP 48SX Calculator
	by Michael Derocher

page 30
	HP 48SX Custom Integrated Circuit
	by Preston D. Brown

pages 32-33
	Mechanical Design of the HP 48SX Memory Card and Memory Card
	by M. Jack Muranami

pages 35-40
	The HP 48SX Calculator Input/Output System
	- An RS-232 link allows communications with personal
	  computers.  An infrared link provides for printing and for
	  two-way calculator-to-calculator communication.
	by Steven L. Harper and Robert S. Worsley

pages 40-43
	Manufacturing the HP 48SX Calculator
	- Sharing manufacturing processes with earlier, simpler
	  calculators shortened development time and improves
	  manufacturing efficiency.  The HP 48SX and the simpler
	  calculators also share the same production line at the same
	  time - a concept known as coproduction.
	by Richard W. Riper

August 1994 Vol. 45 No. 4

pages 6-22
	An Advanced Scientific Graphing Calculator
	- The HP 48G/GX combines an easy-to-learn graphical user
	  interface with advanced mathematics and engineering
	  functionality, expanded memory capability, and seven new
	  plot types.
	by Diana K. Byrne, Charles M. Patton, David Arnett,
	  Ted W. Beers, and Paul J. McClellan

page 20
	User Versions of Interface Tools

June 1996 Vol. 47 No. 3
OmniBook 5000

pages 38-44
	A Full-Featured Pentium PCI-Based Notebook Computer
	- The HP OmniBook 5000 computer takes advantage of new
	  technologies such as mobile Pentium, PCI, plug and play,
	  lithium-ion batteries, and hot docking to give users the
	  same capabilities as their desktop computers
	by Timothy F. Myers

page 42
	Flyback Charger Circuit

pages 45-58
	A Graphing Calculator for Mathematics and Science Classes
	- The HP38G calculator allows teachers to direct students and
	  keep them focused while they explore mathematical and
	  scientific concepts.  It features aplets, which are small
	  applications that focus on a particular area of the
	  curriculum and can be easily distributed from the teacher's
	  calculator to the students'.
	by Ted W. Beers, Diana K. Byrne, James A. Donnelly, Robert
	  W. Jones, and Feng Yuan.

page 54
	Distributed Software Team

pages 59-63
	Creating HP 38G Aplets
	- This article explores a simple aplet and shows how to
	  construct an aplet called PolySides.
	by James A. Donnelly

pages 64-69
	HP PalmVue: A New Healthcare Information Product
	- The HP PalmVue system integrates personal computer,
	  alphanumeric paging, and palmtop computer technology into an
	  effective solution for delivering timely and high-quality
	  patient data to mobile physicians.
	by Edward H. Schmuhl, Allan P. Sherman, and Jon D. Waisnor

page 68
	Data Through Paging Technology

Hewlett Packard Pocket Calculator Buyer's Guide
October 1975
	RPN Logic

Hewlett Packard Personal Calculator Digest
Vol 1, 1976

pages 4-6
	Thermal Printing: A New Dimension in Personal Calculators

pages 24-25
	Service Plus!  A Picture Story

pages 26-28
	CMOS Remembers--A Technological Breakthrough

page 29
	RPN--The Last Word in Professional Logic System

Vol 2, 1977

pages 3, 28
	The "Smart" Card Reader: An Inside Look

pages 4-6
	The Pocket Calculator: Its Advent and Impact

pages 26-27
	Homo Programmus: A New Breed

pages 28
	Card Format

Vol 3, 1977

pages 3, 27
	Business Calculators: The New Blue-Chip Investment

pages 4-6
	Micro-Code: Electronic Building Blocks for Calculators

page 27
	The Logical Choice

Vol 4, 1978

pages 3-6
	Programming: The Way to Grow

pages 30-32
	Engineering for the Cold, Cruel World

page 33
	The Programming Advantages of RPN

Vol 5, 1979

pages 2-3, 28-20
	"Thank You, Beep"...!
	by Gordon Dickson

pages 24-27
	How Programmable Calculators Help Kids Learn
	by Dr. John J. Wavrik 

Vol 6, 1980

pages 3-5, 32
	Display Fundamentals

pages 6-7
	The Fine Art of Chip Manufacturing

pages 30-31
	The Business of Financial Calculators

page 33
	The HP-85: Hewlett-Packard's Personal Computer for Professionals 
Vol 7, 1980

pages 2-5
	Custom HP-41c's Take Off

pages 6-7
	Birth of a Body

pages 8-9
	The Father of RPN

pages 32-33
	The HP-85 and Peripherals

Vol 8, 1981

pages 2-3
	The HP-41C: A Trip to Remember

pages 4-5
	Quality by Design



Craig's Articles



I am Craig A. Finseth.

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