CALCULATORS %C. PERIPHERALS Scientific programmable pocket calculators HP-25/25C. HP-25/25C Specifications

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1 CALCULATORS %C PERIPHERALS Scientific programmable pocket calculators HP-25/25C Keystroke programmable for fast solution of repetitive problems 8 Addressable memories with full register arithmetic 0 HP-2% Features Continuous Memory that retains your programs and data even when you turn the calculator off. HP-2% Scientific Programmable Pocket Calculator With Continuous Memory Continuous Memory (HP-25C only) The continuous memory capability of the new HP-25C can provide tremendous values in time-saving and convenience to any scientist, engineer or student who uses a few long programs repeatedly - for example, if twenty percent of your programs will solve most of your problems. The HP-25C retains a program -no matter how often you switch it on and off - by means of sophisticated complementary metal oxide silicon circuitry (C-MOS). The last program you store is saved, ready for use, until you clear it or enter a new program. As a result, you can program a frequently-needed calculation once, and then perform it as often as necessary - hour after hour, day after day - without the bother or lost time caused by re-entering your program. Lets you add special functions not on the keyboard Continuous memory makes it possible to add specialized functions to those already pre-programmed into the HP-25C. For example, it you anticipate extensive work with hyperbolics, you can program them into the HP-25C where they will be retained by the continuous memory for repeated calculations at the touch of a key. Many specialized functions can be programmed into the HP-25C for fast keystroke calculations, including conversions such as decimal degree/radian, octal/decimal; statistical functions; pricing analysis functions; real estate functions; business functions and many others. Remembers data collected for later use The HP-25C with continuous memory not only retains all information in its 49-step program memory, it also retains all data in the 8 addressable registers and the LAST-X register. This capability lets you use the HP-25C as a notebook to save data from previous problems for later use or to keep the sum of statistical data entries while taking samples in the field. For example, surveyors doing traverses in the field can keep intermediate results even while the calculator is turned off between readings. Engineers will find the HP-25C convenient in storing conversion constants until needed later. HP-25/25C Specifications Trigonometric (all in decimal degrees, radians, or grads): Sin x; Arc Sin x; Cos x; Arc Cos x; Tan x; Arc Tan x. Logarithmic: Log x; Ln x; ex; 10. Statistical: mean and standard deviation; summations giving n, Zx, 2x2, zy, Bxy. Other: y ; 6 l/x; T; xz; %; conversions between decimal hours, degrees, radians, or grads and hours (degrees)/minutes/seconds; rectangular/polar coordinate conversions, integer/fraction truncatisn; absolute value; full register arithmetic. Programming features 49-step program memory; conditional branching based on any of eight relational tests (x<y, x2y, xfy, x = y, x<o, x20, x#o, x = 0); direct branching; ability to review or execute programs step-by-step; ability to add or modify program steps; PAUSE and NO-OPERA- TION program instructions. Memory: eight addressable registers; four-register operational stack; Last-X register. Display: up to 10 significant digits in fixed-decimal notation; up to 8 significant digits plus 2-digit exponent in scientific or engineering notation (in engineering notation all exponents are displayed as multiples of k3); full display formatting in any mode with selective roundoff; indicators for improper operations, low battery; line-number/key matrix program display. Power: AC: 115 or 230 V, f lo%, 50 to 60 Hz. Battery: 2.5 V dc nickel-cadmium Model number and name: Price HP-25 Scientific Programmable Pocket Calculator $145 HP-25C Scientific Programmable with Continuous Memory $200

2 CALCULATORS & PERIPHERALS Scientific/plus pocket calculator HP-27 Every scientific function we ve ever offered in a preprogrammed calculator - plus the added power of statistics and finance. 20 Memories help simplify your most difficult calculations. HP-27 Scientific/plus pocket calculator The new HP-27 Scientific/Plus is the most powerful preprogrammed pocket calculator Hewlett-Packard has ever built. Its highly sophisticated design effectively integrates every significant and financial function - and thus eliminates the need for two separate calculators. The extraordinary versatility of the HP-27 will be extremely valuable to any scientist or engineer whose responsibilities extend into targeting, budgets, cost analysis and other financial and forecasting considerations. New statistical and financial functions greatly expand your calculating power The HP-27 gives you all the most-used statistical and financial functions, including five new functions never before made available on an HP pocket calculator-variance, correlation coefficient normal distribution, net present value and internal rate of return for uneven cash flows. With the remarkable HP-27, you can handle not only scientific calculations but other vital calculations you need to arrive at intelligent financial decisions and recommendations. All the fundamental scientific, statistical and financial functions are preprogrammed and permanently stored in the HP-27. All you have to do is key in your data, press the appropriate function keys and see your answer displayed in seconds. And for added convenience, the HP-27 provides an exceptionally large memory capacity, flexible display controls and selective clearing options. HP-27 specifications Mathematical: Sin, Cos, Tan, Sin-, Cos-, Tan- ; Degrees, radians, and grads angular modes; Ln, ex, log, IO, yx, x2, l/x, K, +, -, X, f, - H.MS,-H, H.MS f; Coordinate conversion. Statistical: Z+ accumulates x, y, x*, y2, xy, and n; 2- deletes unwanted data; linear regression; correlation coefficient; mean and standard deviation; variance; normal distribution factorial. Financial: time-value-of-money calculations involving n (number of compounding periods), i (periodic interest rate), PMT (payment), PV (present value of money), FV (future value); net present value; internal rate of return; percent, percent difference, and percent of total. Memory: 10 addressable registers; five financial registers; four-register automatic memory stack; and a Last-X register. Clearing options: clear the display; clear the stack; clear statistical registers; clear addressable registers; clear the status of the financial registers; clear the prefix keys. Display: up to 10 significant digits in fixed-decimal notation; up to 8 significant digits plus 2-digit exponent in scientific or engineering notation (values are displayed with exponents that are multiples of 3); full display formatting in any mode with selective round-off; indicators for improper operations, low battery. Power: AC: 115 or 230 V, f lo%, 50 to 60 Hz, Battery: 2.5 V dc nickel cadmium Dimensions: length: mm (5.1 ); width: 68.3 mm (2.7 ); height: 30.2 mm (1.2 ). HP-27 Scientific/Plus Pocket Calculator $175

3 I CALCULATORS & PERIPHERALS Scientific & business pocket calculators HP-21, HP-22 Full range of functions plus rectangular/polar conversions Two display formats; two angular modes Hewlett-Packard s efficient RPN logic system A new pocket calculator designed specifically for complete business management HP-21 Scientific Pocket Calculator The HP-21 performs 32 preprogrammed functions and operations including logarithms, and trig calculations, and polar to rectangular conversions in either radians or degrees. Full display formatting allows you to choose between fixed decimal and scientific notation. The RPN logic system tackles even the most complex problems efficiently and gives you continuous and immediate feedback. Combine the HP-21 s capability with its low cost, and you have a price-performance ratio that s simply unbeatable. HP-21 Specifications : Trigonometric (all in degrees or radians): Sin x; Arc Sin x; Cos x; Arc Cos x; Tan x; Arc Tan x. Logarithmic: Log x; Ln x; e ; IO. Other: y ; fi 1 /x; K; rectangular/polar coordinate conversion; full register arithmetic. Memory: one addressable register; four-register operational stack. Display: up to IO significant digits in fixed-decimal notation; up to 8 significant digits plus two-digit exponent in scientific notation; full display formatting in either mode with selective round-off; indicators for improper operations, low battery. Dynamic range: to IOy9 (200 decades). Power: AC: 115 or 230 V, f lo%, 50 to 60 Hz. Battery: 2.5 V dc nickel-cadmium HP-21 Scientific Pocket Calculator $80 HP-22 Business Management Pocket Calculator The HP-22 business management pocket calculator puts an ideal combination of financial, mathematical and statistical functions at your fingertips. With it, you can handle everything from simple arithmetic to complex time-value-of-money computations. You can even handle planning, forecasting and decision analysis. And, you can approach business problems in a variety of ways to arrive at intelligent decisions and recommendations based on facts. The HP-22 automatically calculates discounted cash flows; percentages; ratios; proportions; compound interest; remaining balance; annuities; depreciation; mean and standard deviation; rate of return; amortization and mbre. HP-22 Specifications Financial: time-value-of-money calculations involving n (number of compounding periods), i (periodic interest rate), PMT (payment amount), PV (present value of money), FV (future value of money); simple interest; accumulated interest between payment periods of a loan; remaining balance of a loan. Statistical: mean and standard deviation; linear regression; linear estimate; summations giving n, Sx, Zy, 2x2, Zxy. Percent: %, A%, percent one number is of another; percent one number is of a total; markups; discounts. Other: Ln; ex; yx; fi full register arithmetric. Memory: IO addressable registers; five financial registers; four-register operational stack. number of decimal places (0 to 9) in fixed-decimal notation; 8 significant digits plus two-digit exponent and appropriate signs in scientific notation; indicators for improper operations, low battery. Power: AC: 115 or 230 V, 3= IO%, 50 to 60 Hz. Battery: 2.5 V dc nickel-cadmium HP-22 Business Management Pocket Calculator $1 25

4 CALCULATORS 81 PERIPHERALS Fully programmable calculators HP-97. HP-67 Exceptional programming power and ease of use for lengthy, repetitive calculations. Smart magnetic card- reader frees your mind by automatically recording the display mode setting, angular mode setting, and the status of the four flags when you record your program. HP-67 Fully-Programmable Pocket Calculator HP-97 Fully-Programmable Printing Calculator These are the most powerful personal calculators Hewlett-Packard has ever made. The HP-97 combines exceptional programming power-plus a battery-operated printer all in one self-contained unit. The HP-67 provides the identical programming power of the HP-97 in the classic pocket size. The HP-67 is completely compatible with the HP-97. Programs recorded on the unit may be loaded and executed on the other - even the print commands (e.g., when the HP-67 executes a Print X command, it pauses, and displays the current results). Used separately - or together - these compatible fully programmable calculators do the job faster and with less chance for error. HP-97/67 specifications Mathematical: Sin, Cos, Tan, Sin-, Cos-, Tan- ; Degrees, radians, grads angular modes: Coordinate conversion; Degree/radian conversion: Hour/minutes/seconds addition and.conversion to decimal hours; Log, IO, Ln, ex; Integer truncation; Fraction truncation; Absolute value; Rounding; +, -, X, +, y, x2, I/x, & N!, %, %CH, *. Statistical: mean and standard deviations; Summations n, Bx, Ex2, Zy, Zy2, Bxy; Deletion of unwanted data. Programming features Card Reader features: Record/Load all data registers; Load selected data registers; Record/Load entire program memory; Merge program subsections: Angular mode, flag settings, and display status are recorded with program recording and reset with program loading; User is prompted for proper operation when loading; Card reader operations can be initiated manually or under program control (except program recording). Addressing: label addressing; indirect addressing of labels and data storage; Relative addressing; IO user-definable keys or 20 user-definable labels; Three levels of subroutines (GSB). Conditionals: x=y, xfy, x>y, x<y, xf0, x=o, x<o, x>o Four flags; Increment, decrement storage registers and skip on zero. Editing: single step execution; Single step and back step inspection of a program; Insert/Delete editing. Position the calculator at any step in program memory (GTO. nnn). Other Programming features PAUSE to review intermediate results, key in data or load magnetic cards. Memory: 224 steps of program memory (all functions are merged and occupy only one step of program memory); 26 data registers; Fourregister automatic memory stack; Last-X register. Display: up to 10 significant digits with selective round-off to desired number of places in fixed decimal notation; up to IO significant digits plus two digit exponent and appropriate signs in scientific and engineering notation (where values are displayed with exponents that are multiples of 3). HP-97 Printing features Quiet, thermal printer lets you record and label your calculations. Print mode switch selects three printing modes. In addition you can print and label the contents of the stack registers, the primary data storage registers, program memory, and the display. HP-97 Power: Vac or Vac, 50 to 60 Hz or 5.0 V dc nickel cadmium HP-67 Power: Vac or Vac, 50 to 60 Hz or 3.75 V dc nickel cadmium HP-97 Dimensions: length mm (8 ); width mm (9 ); height: 63.5 mrn (2.5 ) HP-67 Dimensions: length mm (6 ); width: 81 mm (3.2 ); height 18 to 34 mm (0.7 to 1.4 ). Model number and name Price HP-97 Fully Programmable Printing Calculator $750 HP-67 Fully Programmable Pocket Calculator $450

5 CALCULATORS & PERIPHERALS Business pocket & scientific printing calculators HP HP-91 The financial pocket calculator that solves nearly all time-value-of-money calculations Quiet thermal printer provides a complete record of all your calculations 0 Operate on battery or AC All the most-needed scientific functions - preprogrammed for speed and accuracy HP-80 Financial Pocket Calculator HP-91 Scientific Printing Calculator The HP-80 financial pocket calculator offers even more financial problem-solving power than the HP-22. With 36 separate financial functions, the HP-80 automatically computes bond yield and price; conversions from add-on interest to APR; sum-of-the-digits depreciation schedules and Rule of 78 s interest rebates and more - plus all the financial functions of the HP-22. In addition, the HP-80 gives you a built-in 200-year calendar so that you can quickly figure the exact number of days in a bond or loan transaction; mean and standard deviation; and trend-line analysis using linear regression. HP-80 Specifications Financial: all functions of the HP-22, plus: bond yield and price (both yield-to-maturity and yield-to-call); conversion from add-on interest to APR; sum-of-the-digits depreciation schedules and Rule of 78 s interest rebates. Statistical: mean and standard deviation, trend-line analysis using linear regression; summations giving n, Zx, 2x2. Percent: %, A%, markup, discount. Other: yx; fi Memory: one addressable memory; four-register operational stack. number of decimal places (0 to 6) in fixed-decimal notation; IO significant digits plus two-digit exponent and appropriate signs in scientific notation; indicators for improper operations; low battery. Power: AC: or , 50 to 60 Hz. Battery: 3.75 V dc nickel-cadmium Dimensions: length: 14.7 cm (5.8 ). Width: 8.1 cm (3.2 ). Height: 1.8 to 3.3 cm (0.7 to 1.3 ). HP-80 Financial Pocket Calculator $295 The new HP-91 Scientific Printihg Calculator provides you with a full range of scientific and arithmetic functions - complete with a printed record - all in one compact calculator. And because the HP- 91 prints and operates on AC or its own built-in batteries you can use it anywhere - in the office or in the remotest field locations. HP-91 Specifications Mathematical: angular mode switch selects degrees, radians, or grads; Sin, Cos, Tan, Sin-, Cos-, Tan- ; Ln, ex, log, IO ; H.MS*, - H.MS, H.MS -; Coordinate conversion; yx, l/x, fi, T, xz, %, A%, %E, +, -, X, t. Statistical: 2: accumulates x, y, x2, y2, xy, n; Z- deletes unwanted data; mean and standard deviation; linear regression; linear estimate; factorial. Memory: 16 addressable registers; four-register automatic memory stack; last-x register. Clearing options: clear the display; clear addressable registers and stack; clear statistical registers; clear addressable registers Ro-R9. number of places in fixed decimal notation; up to 10 significant digits plus two digit exponent and appropriate signs in scientific and engineering notation (where values are displayed with exponents that are multiples of 3). Printing features: quiet, thermal printer lets you record and label your calculations. Print mode switch selects three printing modes. In addition, you can list the stack, list the addressable registers, list the statistical registers and print the displayed value. Dynamic range: to Power: V ac or V ac, 50 to 60 Hz or 5.0 V dc nickel cadmium Dimensions: length: mm (8 ); width: mm (9 ); height: 63.5 mm (2.5 ). HP-91 Scientific Printing Calculator $425