Valentin Albillo's HP Collection

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HP Calculators

HP Calculator Raw Scans

This Section features scans I've made of assorted documents other than Pictures or Brochures, such as booklets or bulletins. Most are part of my Project HAM, i.e., scans of 40+ year-old vintage documents not authored by me but which were sent to me back then, and due to their perceived rarity (even uniqueness right now) I'm making them available here.

I scanned most paper documents at 300 dpi, resulting in hi-res 2,552 x 3,508 PNG images, which were then converted to multi-page PDF documents with embedded OCR'd texts (e.g.: to allow for copy/paste operations). Some of them also include text pages with my own Notes, providing background info and extra details.


PDF HP Raw Scan - 27 Programas para la HP-34C (Full Scan)

(126 pages, scanned by Fernando del Rey, in Spanish with Notes in English)

This set of 27 programs for the HP-34C was developed by Eugenio E. Ubeda Forte in September, 1980. The truly excellent typewritten documentation for the programs is both very extensive (123 pages, average 4.5 pages per program) and comprehensive. The titles for all 5 categories and 27 programs follow, in both the original Spanish and in English:

Caveat lector: All the documentation is in Spanish. However, as the subject matters are mostly mathematical in nature, it's perfectly possible to follow and run the examples with little difficulty, thus also learning how to use the programs.

27 Programas para la HP-34C (by Eugenio E. Ubeda Forte, Sept. 1980; 123 pages)

   1. Matrices y sistemas lineales  (Matrices and linear systems)

      1.1. Multiplicación de una matriz cuadrada por su transpuesta  (Multiplication of a square matrix by its transpose matrix)
      1.2. Factorización y determinante de una matriz cuadrada  (Square matrix factorization and determinant)
      1.3. Factorización y determinante de una matriz simetrica  (Symmetric matrix factorization and determinant)
      1.4. Solución de dos ecuaciones simultáneas con coeficientes complejos  (Solving 2x2 linear systems with complex coefficients)

   2. Polinomios  (Polynomials)

      2.1. Suma de productos de orden N de M números reales  (Sum of Nth-order products of M real numbers)
      2.2. Algoritmo de Horner  (Horner's method)
      2.3. Algoritmo de Horner de doble fila  (Two-row Horner's method)
      2.4. Recíproco de un desarrollo polinómico  (Coefficients of the reciprocal of a polynomial)
      2.5. Potenciación de un desarrollo polinómico  (Coefficients of the Nth power of a polynomial)
      2.6. Exponenciación de un desarrollo polinómico  (Coefficients of the exponential of a polynomial)
      2.7. Estabilidad de polinomios: Criterio de Routh.  (Polynomial stability: Routh's Criterium)
      2.8. Evaluación de polinomios de Chebyshev y sus raices  (Chebyshev's Polynomials evaluation and roots)
      2.9. Transformación de un polinomio en una expansión de Chebyshev  (Transformation of a polynomial into a Chebyshev's expansion)
      2.10. Transformación de una expansión de Chebyshev en un polinomio  (Transformation of a Chebyshev's expansion into a polynomial)
      2.11. Cambio de variable en polinomios  (Change of variable in polynomials)

   3. Interpolación y aproximación  (Interpolation and approximation)

      3.1. Interpolación polinómica  (Polynomial interpolation)
      3.2. Desarrollo de Fourier de funciones con valores discretos  (Fourier Series expansion of a function given as a set of discrete data points)
      3.3. Desarrollo de Fourier de funciones discretizadas  (Fourier Series expansion of a user-specified function f(x))
      3.4. Desarrollo de Fourier por integración de coeficientes  (Fourier Series expansion coefficients obtained by integration)
      3.5. Desarrollo de Chebyshev de funciones discretizadas  (Chebyshev Series expansion of a user-specified function f(x))
      3.6. Desarrollo de Chebyshev por integración de coeficientes  (Chebyshev Series expansion coefficients obtained by integration)

   4. Ecuaciones diferenciales  (Differential equations)

      4.1. Solución de ecuaciones diferenciales de 1º orden  (Numeric solution of first-order differential equations)
      4.2. Solución de sistemas de dos ecuaciones diferenciales de 1º orden  (Numeric solution of a system of two first-order differential equations)
      4.3. Solución de ecuaciones diferenciales de 3º orden  (Numeric solution of third-order differential equations)

   5. Varios  (Miscellaneous)

      5.1. Filtros activos Sallen-Key de 2º orden  (Sallen-Key active filters of the second order)
      5.2. Filtros activos Sallen-Key de 3º orden  (Sallen-Key active filters of the third order)
      5.3. Equilibrado dinámico en dos planos  (Dynamic balancing on two planes)

PDF HP Raw Scan - A Blackbox Handbook to Synthetic Programming Techniques (Full Scan)

(16 pages, 3.133.875 bytes)

A 16-page booklet by Phill Jury (PPC #5484) which was sent to me by John McGechie (PPC Melbourne Chapter) circa 1980, and which I've discovered recently among my 40+ year-old vintage materials so I thought it would be proper to scan it and upload it to this Section as well. Phill says:

"This book is designed to teach the person who has neither the time nor the inclination to learn how the 41C goes about carrying out various non-standard techniques, but explains in detail (step by step instructions), how to use these techiques."

PDF HP Raw Scan - A Capability Study on the HP-35 Pocket Calculator (Full Scan)

(10 pages, 8,946,653 bytes, scanned by Fernando del Rey)

The HP-35 is a 35-key, pocket-sized scientific and engineering calculator. [...] In terms of general advantages, this unit provides much of the problem-solving power of a desktop scientific calculator, combined with the portability and convenience of the slide rule. Unlike the slide rule, it offers unprecedented accuracy and provides answers in a fraction of the time required for slide rule calculation. This Capability Report will explain and evaluate special features of Hewlett-Packard's HP-35 Pocket Calculators, typical applications with comparison of solution times (*), how the unit operates, advanced technological features and general specifications.

(*) The following problems were selected from engineering notebooks and were given to members of Hewlett-Packard's own engineering staff for solutions. Each engineer was asked to time himself in working each problem in two ways: first, with a pilot model of the HP-35, and second, by conventional slide rule methods. Actual results are shown with comparison times, together with keystrokes for the HP-35 and scratch notes required for arriving at the slide rule solutions.

PDF HP Raw Scan - A Guide to Profitable Decision Making (Full Scan)

(28 pages, 37.699.863 bytes)

A Guide to Profitable Decision Making - Hewlett-Packard’s introduction to basic financial concepts every business manager should know. DECISIONS - the single most important factor facing a manager. This guide is about time and money.

PDF HP Raw Scan - Boletin #0 Club Usuarios Calculadoras HP Barcelona (Full Scan)

(33 pages, 13.177.030 bytes, in Spanish and others)

This 32-page magazine arrived 1983-10-01 in a big envelope by regular mail sent from Barcelona (Spain). They sent me their #0 issue, which features an interesting mix of programs, routines, hint, tips, articles and even some adds, mostly for the HP-41C in this particular issue, including data sorting, artificial satellites' tracking, synthetics, polynomial arithmetic, "alien" games, special functions and numeric analysis, etc., in both Spanish and other languages. Includes HP-41C barcodes for the programs featured. Includes Notes.

PDF HP Raw Scan - ENTER contra Igual (Full Scan)

(8 pages, 6.663.984 bytes, in Spanish)

Calculadoras cientificas de bolsillo - la verdadera historia. Una discusion practica, problema por problema, de los sistemas logicos usados en las actuales (ca. 1977) calculadoras cientificas de bolsillo.

PDF HP Raw Scan - HP Advanced Programmable Calculator Survey (Full Scan)

(12 pages, 2.955.836 bytes)

This arrived as a thick 1977 letter from HP "sent to only a few HP-67 and HP-97 owners", encouraging us to take a very comprehensive survey and then send the completed questionnaire back to them. The large envelope included a one-page letter plus the survey's questionnaire proper, which consisted of 8 pages featuring 36 quite complex and detailed, very specific questions. Oh, and a return envelope as well. Includes Notes.

PDF HP Raw Scan - HP-35 Carta y Folleto (Full Scan)

(5 pages, 4,269,189 bytes, in Spanish, scanned by Fernando del Rey)

Carta de HEWLETT-PACKARD ESPAÑOLA, S.A. dirigida a profesionales y empresas de ingenieria y arquitectura, presentando la nueva HP-35, adjuntando un folleto de 4 paginas a todo color que incluye una orden de pedido de una o mas unidades, ya sea a nivel corporativo o individual, y con pago mediante facturacion (40.000 Pts/unidad) o al contado (38.000 Pts/unidad), con posibilidad de devolución en el plazo de 10 dias.

ZIP HP Raw Scan - HP-41 Users Program Library Europe - Batch 01 (Full Scan)

(5 PDF, 52 pages)

Contains the following 5 Program Submittals to the HP Users' Program Library Europe:

            00000  Simon
            10264  Music Writer - Clarinet Transposition
            10282  Yatzy.pdf
            10307  Linear Programming (Simplex Method) I
            10308  Linear Programming (Simplex Method) II

PDF HP Raw Scan - HP-41 Users Program Library Europe Catalog (Full Scan)

(100 pages, in English, Spanish, German, French, Italian, Other)

HP-41 Users' Program Library Europe - Catalogue of contributed programs for the HP-41.

This catalog contains user-contributed programs grouped by language (colour coded pages). To find a program of interest, first look up the Applications Category Table e.g. Astronomy 510. Then you go to the « Application Index » (e.g. under 510) and note the running number of all programs which appear relevant. Then you go to the « Program Abstracts » section where programs are listed in numerical order, together with a brief description.

PDF HP Raw Scan - HP-55 Programs by Fernando del Rey (Full Scan)

(31 pages, in Spanish, includes Notes in English)

Back in 1975 my friend Fernando del Rey owned an HP-55, an awesome calculator for the time but severely limited as far as programmability was concerned. With as little as 49 unmerged program steps you really couldn't do much but nevertheless Fernando strived to do his best and produced a number of HP-55 programs, which I've collected in this particular document so that his early efforts get preserved for posterity.

List of the 19 Programs for the HP-55 included in this document:

PDF HP Raw Scan - HP-65 User News V1N1

HP-65 Users' News Volume 1 Number 1. In this issue:

      Inside an HP-65
      Users' Library Corner
      Top Ten Programs
      New Program Trends
      Programming Tips
      Questions - and Some Answers
      HP-65 at Le Mans
      How Fast is the HP-65 ?
      Application Pac Corrections
      Application Pac News
      Two New Scientific Calculators

PDF HP Raw Scan - HP-67 Programs by Fernando del Rey (Full Scan)

(51 pages, in Spanish and English, includes Notes in English)

Back in 1977 my friend Fernando del Rey owned an HP-67, a state-of-the-art calculator with the best programmability bar none. With 224 merged program steps and 26 addressable registers you could do wonders and both Fernando and I strived to do our best and produced a number of HP-67 quality programs. Many of mine I've already included in Cuaderno ICAI, and here I've collected in this particular document Fernando's early efforts (programs and drafts) so they won't get lost.

List of the 16 Programs and drafts for the HP-67 included in this document:

ZIP HP Raw Scan - HP-67 Users Program Library Europe - Batch 01 (Full Scan)

(16 PDF, 193 pages, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library Europe:

            00204  Pinball Wizzard
            00205  Star Trek Advanced
            00206  Dog Races
            00210  Game of Life (9x9)
            00222  Jack of Eagles (Game)
            00252  LNAP (Ladder Network Analysis Program)
            00297  LC-LNAP, LC Ladder Network Analysis Program
            00301  Second Order Active Network Pole and Zero Polynomial Coefficients
            00315  Curve Fitting Using the Cubic Spline Method
            50003  Logic Circuit Simulator
            50024  Sequential Logic for up to 9 Unknowns (Propositions)
            50029  Car Simulator
            50089  5th Degree Equation
            50116  Coder - Decoder
            50145  Magic Squares
            50146  Solution of a Fifth or a Sixth Order Linear System

ZIP HP Raw Scan - HP-67 Users Program Library Europe - Batch 02 (Full Scan)

(16 PDF, 96 pages, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library Europe:

            50232  Direct PIAL Compiler
            50256  Trade Business Plan Game
            50313  PIAL Executer
            50495  Multiple Integrals
            50499  Reaction Time Indicator With NNN's
            50500  Mate Your HP's King with King, Bishop and Knight, in 35 Moves
            50520  Approximation by Legendre Polynomials up to Degree 7
            50536  Lose Three
            50555  PIAL Editor
            50653  Nth Degree Polynomial .le.18 Bairstow Method
            50657  Complex Operations Programmable 45
            50683  Linear Systems (Complex Coefficients)
            50684  Linear Systems 7x7
            50685  Determinants
            50687  Polynomial Regression Degree 1, 2, 3, 4
            50696  Chess - End Game 1

ZIP HP Raw Scan - HP-67 Users Program Library Europe - Batch 03 (Full Scan)

(16 PDF, 101 pages, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library Europe:

            50784  Fourier Coefficients
            50812  5x5, 4x4, 3x3 Matrices or Unknown Equations
            50813  Conversion of Legendre Polynomials into Power Series
            50925  Linear Second Order Boundary-Value Problem
            51061  Inverse Mastermind
            51114  Twonky
            51130  Solving Mastermind with HP 67-97
            51193  5x7 Matrix Letter and Symbol Printer
            51262  Theseus and Minotaurus
            51352  Chebyshev Economisation
            51403  Double Precision Arithmetic for Positive Integers
            51657  50 Steps Programmable HP Machine for Complex Calculus
            51658  Approximation by a Sum of 4 Whatever Functions
            51660  4 Simultaneous Equations in 4 Rational Variables
            51702  Cyclic Patterns
            51772  Texas Simulator

ZIP HP Raw Scan - HP-67 Users Program Library Europe - Batch 04 (Full Scan)

(16 PDF, 112 pages, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library Europe:

            51187  Game of Life (23x31)
            51877  MIT Public-Key Cryptosystem and Digital Signatures
            51881  Fourier Coefficients for Linear Composed Functions
            51892  Literal Derivation Function up to 100 Steps
            52046  Square Root to 182 Figures
            52058  Sea Battle
            52112  Palindromic Numbers
            52165  Linear Systems
            52206  A Chess Game
            60084  BASIC 67
            60377  Fourier Series - Harmonic Analysis - Discrete Domain
            60453  Elliptic Lowpass Filter Design
            60454  Factors of a Number_ the Fastest Program on the Subject
            60534  Areas, Lengths of Arcs, Volumes & Surfaces of Revolution
            60535  Numerical Analysis of Functions
            60582  Summation of an Infinite Alternating Series

PDF HP Raw Scan - HP-67 Users Program Library Europe Catalog (Full Scan)

(84 pages, in English, Spanish, German, French, Italian, Other)

HP-67/97 Users' Program Library Europe - Catalogue of contributed programs for the HP-67/97.

This catalog contains user-contributed programs grouped by language (colour coded pages).

PDF HP Raw Scan - HP-67 Users Program Library Europe Catalog Supplement (Full Scan)

(28 pages, in English)

Supplement to the HP-67/97 Users' Program Library Europe - Catalogue of contributed programs for the HP-67/97

Features 520 new programs, with abstracts, including some contributed by Fernando del Rey (e.g.: 52055D - 67-Solution to a System of Linear Equations) and yours truly (e.g.: 52056D - 67-Incomplete Elliptic Integral of the 1st Kind & Functions.)

ZIP HP Raw Scan - HP-67 Users Program Library USA - Batch 01 (Full Scan)

(16 PDF, 127 pages, 7,534,300 bytes, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library USA:

            00179D  Space War
            00200D  Blackjack Game
            00216D  Mastermind Deluxe
            00219D  Shooting Gallery
            00220D  Game of Life
            00256D  Probe Word Game
            00259D  Duel
            00266D  Concentration
            00278D  Blackjack - Las Vegas Style
            00321D  Pinball Wizzard
            00325   Cybernetic Nim Game
            00326D  Bagels1-5 Game
            00369D  Advanced Star Advanced
            00463D  Game of Life (9x9)
            00499D  Battleship I
            00501D  Baseball

ZIP HP Raw Scan - HP-67 Users Program Library USA - Batch 02 (Full Scan)

(16 PDF, 109 pages, 6,689,422 bytes, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library USA:

            00537D  Championship Golf
            00538D  Roulette Deluxe
            00552D  Fourty-Four_ A Game of Deduction
            00555D  Baseball
            00586D  Football
            00616D  Objective (Tank War)
            00626D  Life
            00687D  American Roulette Wheel
            00727D  Jack of Eagles
            00733D  Roulette Game
            00734D  Jotto 2
            00739D  Daytona 500
            00747D  Football
            00825D  Golf With Unique Putting Routine
            00850D  Number Hunt
            00853D  Orbitor Game

ZIP HP Raw Scan - HP-67 Users Program Library USA - Batch 03 (Full Scan)

(16 PDF, 121 pages, 7,597,309 bytes, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library USA:

            00873D  Basketball
            00874D  Ping-Pong
            00875D  Electronic Ping Pong
            00888D  Mastermind
            00959D  Programmers' Bell Slot Machine
            00964D  Robot Trap
            01173D  Hunt the Wumpus
            01370D  Blackjack
            01412D  Matrix Game - Calculator Learns to Learn
            01471D  Slalom Ski
            01475D  Rational Tic Tac Toe
            01495D  Baseball
            01497D  Crack the Vault
            01511D  Pinochle
            01532D  Moon Lander with Untinterruptible Continuous Countdown
            01581D  Sink the Yamamoto

ZIP HP Raw Scan - HP-67 Users Program Library USA - Batch 04 (Full Scan)

(16 PDF, 117 pages, 7,948,985 bytes, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library USA:

            01650D  Random Sequence of Numbers
            01767D  Magic Squares
            01798D  Bridg-It
            01800D  Fortress
            01816D  Monopoly
            01829D  Unbreakable Cipher System; Cryptography
            01838D  Draw Poker
            01884D  Noughts & Crosses
            01918D  Keno Simulation
            01927D  Advanced Battleship
            02039D  Super Bagels - Easy-Does-It
            02335D  Star Wars
            02845D  Space War Plus
            02900D  Telepathy
            02913D  Game of 15
            02925D  The Game of 3D Tic Tac Toe

ZIP HP Raw Scan - HP-67 Users Program Library USA - Batch 05 (Full Scan)

(16 PDF, 87 pages, 5,491,953 bytes, scanned by Fernando del Rey)

Contains the following 16 Program Submittals to the HP Users' Program Library USA:

            02962D  Mine Field
            03100D  Bowling Game Simulator
            03130D  Keno Special
            03288D  Checkers
            03952D  How Old Are You
            03954D  Down the Middle
            03958D  I.Q. Tester
            03961D  Number Guesser Game
            04061D  Exterminator
            04118D  Toss and Score
            04122D  Fan Tan
            04190D  Sic Bo (Dice game)
            04191D  Paper Rock Scissors
            04196D  Labyrinth
            04199D  Guess the Number
            04356D  Engine Out

ZIP HP Raw Scan - HP-67 Users Program Library USA - Batch 06 (Full Scan)

(4 PDF, 26 pages, 1,374,287 bytes, scanned by Fernando del Rey)

Contains the following 4 Program Submittals to the HP Users' Program Library USA:

            04463D  Catch Me If You Can
            04464D  Modified Moon Rocket Lander
            04505D  Chess - The 8 Queens Problem
            04510D  Guess the Card Suit

PDF HP Raw Scan - Measurement Computation News Jan-Feb 1987

HP-28C. Use scientific calculator for symbolic mathematics.

The HP-28C Scientific Professional Calculator is a new technical calculator capable of doing symbolic mathematics. Algebra and calculus operations can be performed with a few keystrokes. Problems can be solved conceptually and numbers keyed in later.

PDF HP Raw Scan - Measurement Computation News Jul-Aug 1984.pdf

The HP-71B Handheld computer packs computational power and expandability into pocket size.

Hewlett-Packard's HP-71B Handheld Computer, designed especially for technical professionals, is a versatile, easy-to-use tool for numeric computation and calculation.

PDF HP Raw Scan - Once Upon a Pocket

(12 pages, original document, not a scan)

Once Upon a Pocket: Programmable Calculators from the Late 1970s and Early 1980s and the Social Networks Around Them

Programmable pocket calculators of the mid-1970s opened up a new segment of the personal computing devices market. Calculator users established clubs, magazines, and conferences, and their interaction with manufacturers shaped the products’ further development. This article explores one of the understudied roots of personal computing, through the evolution of the user communities formed around the TI-59 and HP-41C calculators.

PDF HP Raw Scan - PPC Club Melbourne Chapter Newsletter October 1980 (Full Scan)

A complete 10-page newsletter published by the Australian PPC Club Melbourne Chapter, sent by John McGechie back in October 1980. If you zoom on the quite-faded thermal-paper label you'll see it's addressed to yours truly, and you'll also find me mentioned in page 3 of the newsletter (page 5 of the PDF), I quote:

"A long and fascinating letter from Valentin Albillo had arrived a few days before the meeting, reporting on his latest incredible work (see Overseas News), producing delighted cheers, especially when it was observed that he was one of the two or three overseas members of our Melbourne Chapter. (We are prepared to take all credit, of course...)"

PDF HP Raw Scan - Prof Computing V1N1 1984 - HP-71B A Fistful of Power (Full Scan)

The HP-71B is a brand new machine with computing power far beyond most microcomputers and scientific calculators found on the market today.

At first blush, Hewlett-Packard’s pocket-size HP 71B looks like a cross between the HP Series 41 calculators and a stripped down HP 75 portable. It's not. The 71B is a brand new machine with computing capability far beyond most microcomputers and scientific calculators. And for the first time with a small computer, HP has made available the Internal Design Specifications (IDS) with source code and schematics. While one can't actually call the 71B a pocket IBM 370, it’s close.

PDF HP Raw Scan - Prof Computing V1N1 1984 - Series 40 When and What (Full Scan)

Many users have wondered about the history behind the Series 40. It can be traced back to the introduction of the HP-41C on July 16, 1979. The HP-41C was promoted as the first alphanumeric, fully programmable, continuous memory, handheld calculator. The first HP-41 contained many first-time features such as liquid-crystal display and redefinable keyboard.

The HP-41C has 441 bytes of program memory or 63 data registers in the main memory configuration. The major peripherals available at introduction were the HP 82143 thermal printer and HP 82104 magnetic card reader. The HP 82153 optical wand for reading bar coded programs and data became available on July 1, 1980. [...]

PDF HP Raw Scan - Prof Computing V1N4 1984 - HP-41 In Orbit (Full Scan)

When communication between the orbiting space shuttle and the ground fails, only the HP 41 stands between a safe re-entry and disaster.

The orbiting space shuttle is in trouble. Communications with the ground are out and the power systems are failing. Soon there won’t be enough power for a controlled re-entry. It’s time to come home. [...] Stuck to a nearby console is a rather fuzzy-looking HP 41, one of several on board. [...]

Six months before the first shuttle flight, Terry Hart was asked to find the best calculator for the astronauts. He looked at the TI-59 and the HP 41, the most powerful units available, and decided that the 41’s alphanumeric display capability made it the clear winner.

PDF HP Raw Scan - Prof Computing V1N4 1984 - HP-41 Plotting for your Birthday (Full Scan)

A sure way to arouse a non-computer user's interest in computers or to provide an easy-to-understand introduction to computing is to combine personal characteristics such as birthdays, horoscopes and biorhythms with a computer application. HP recognized this natural tie-in and, as part of some early system demos, distributed a Birthday Plot routine to demonstrate plotter capabilities. On page 77 is a Series 40 version of one of these routines to amaze your friends [...].

Before dismissing this program as just a showy trick, it may pay to look at the program for ideas on programming techniques. This may not be the optimum version, depending on what constraints you wish to apply, but some areas are worthy of mention. The first is the random number generator [...]

PDF HP Raw Scan - Prof Computing V1N4 1984 - HP-71B Proud Parent in Corvallis (Full Scan)

Janet Placido is a proud parent. [...] But Placido’s newborn is not just any kid. It gestated for five years, talks in BASIC and does 6 x 6 matrix inversions in 2.5 seconds. [...] Its given name is HP-71B, but the beaming parents nicknamed it Titan.

The birth of the 71B was a joyous event, especially for Placido, who was a driving force in the design of its operating system. At 32, this dynamic, straight-talking computer scientist is already a project manager, who supervised a team of software engineers devoted to making the 71B the most powerful, most adaptable, most user-friendly handheld ever created.

PDF HP Raw Scan - Prof Computing V1N4 1984 - HP-71B Wanted Software Writers (Full Scan)

If you're a professional software writer looking for a new market, HP is looking for you. HP will pay a 50 percent royalty on HP 71 software packages that it accepts for sale through its new Software Distribution Center (SDC) run by the Users Library in HP’s Corvallis, OKR facility. HP also will include summaries of accepted programs in a software catalog to be included with each 71.

The SDC will duplicate the software for customers on whatever medium you provide—magnetic cards, minicassettes or 3.5-inch disks. You also must provide the documentation.

PDF HP Raw Scan - The Story of PPC

This is an automatic translation to English (pretty good quality, IMHO) of the original text written by Dejan Ristanovic, titled "Priča o PPC-ju", which can be found at www.dejanristanovic.com

The document features a short (10 pages) story of the PPC Club, from its original inception as 65 Notes in June 1974 to the demise of CHHU (PPC Club's follow-up) circa February 1987, as seen by Mr. Ristanovic. In his own words:

"[...] it occurred to me to look for people I once knew (at least through letters) [...] Some I found, some I didn’t, and what surprised me the most was that a magnificent organization like the PPC Club had simply disappeared, leaving almost no trace of it. Believing that the story of that Club deserves to be told, I will dedicate a part of my website to it ..."

PDF Introducing Project HAM (Historic Albillo Materials)

This PDF document describes Project HAM (Historic Albillo Materials).

Since June 2021, I'm scanning most of my 40+ year-old still surviving vintage materials. My goal is to upload most everything I've kept stored since then, for interested people to download, read, and get an idea of that Golden Age.

My surviving vintage materials consist of some 4,000 pages, most of which I've scanned at 300 dpi, and have been kindly and expertly postprocessed by Eric Rechlin himself, then collected into multi-page PDF documents, which also include OCR'd text of variable quality. Additionally, some of them also contain a text file with my very own Notes detailing the document's background and interesting trivia.

The selected scanned vintage materials (which I'll upload on a regular basis) include, among others: [... read the full details in this PDF document ...]
 


COPYRIGHT NOTICE
These articles, programs, pictures, their descriptions and other materials created by me are (c) Valentin Albillo, and can be used freely for non-profit purposes as long as (1) the contents aren't modified in any way and (2) the copyright is acknowledged. In plain words, you can download them and use them for non-profit purposes but do not include them in any media and/or site for which you're asking money, do not tamper with their contents and do not say or imply that you created them or that you don't know who created them, you must always give due credit to me.