 REAL Numbers - Version 2.0                                       TAPE.TXT
 -------------------------------------------------------------------------
 Copyright 1993 BU Systems Company
 PO Box 806, Ashland, OR 97520
 Phone: 503-482-9541

                              CONTENTS
                          -------------------
                          1. Program Features
                          2. Examples
                          3. Version History


 This document provides an overview of REAL Numbers (TAPE.ZIP or
 TAPEX.EXE self-extracting archive).

 REAL Numbers is a general purpose business, scientific, and formula
 calculator.  Overlappping windows display scrolling tapes that can be
 edited, saved, and printed.  The program combines the ease of use of a
 desktop calculator with powerful spreadsheet-like capabilities.  REAL
 Numbers is useful for a wide range of financial, technical, home, and
 school applications.  REAL Numbers can be used for managing a checkbook
 or for business accounting, and for myriad other uses.


 PROGRAM FEATURES
 ----------------
 * Up to 15 unlimited length scrolling tapes in overlappping windows.
   Actual maximum tape length is limited by computer memory and complexity
   of the tape.  About 8,000 lines is typical capacity for 640kb.  It runs
   well on floppy systems with 256kb.

 * A text column in each tape for notations and labels alongside the
   computations.

 * Over 30 built-in functions and operators:

      + - * / Arithmetic         DL    Delta percent
      e pi    Constants          RND   Round
      %       Percent            ABS   Absolute value
      ^       Power              MOD   Modulus
      S T P   Subtotal, Total
      SQR     Square root        -- Finance and Business --
      INV     Inverse (1/x)      PV    Present value
      LOG     Log base 10        FV    Future value
      LN      Log base e         PVA   Present value of annuity
      SIN     Sine               FVA   Future value of annuity
      COS     Cosine             LAMT  Loan amount
      TAN     Tangent            LPMT  Loan payment
      ASIN    Arcsine            LINT  Loan interest
      ACOS    Arccosine          LPER  Loan payment periods
      ATAN    Arctangent         GPM   Gross profit margin
      DTOR    Degrees to radians
      RTOD    Radians to degrees

 * Report writer for formatting and printing tapes.  This can be used to
   produce documents such as balance sheets and budgets.

 * Evaluation of formulas and algebraic expressions with nested parentheses,
   such as (SQR(LOG(100))+3)*VELOCITY.

 * Automatic background recalculation whenever a tape line is changed.

 * Unlimited number of user defined named memory variables, for example
   "VELOCITY", "CM_INCH", or "SALES".  Memory functions operate in a manner
   similar to memory registers found on pocket calculators.

 * File handling for saving, loading, and exporting tape files, including
   the ability to export comma delimited files for loading into spreadsheets
   and other programs.

 * Flexible setup options, including:

   - Ten Key calculator emulation mode.
   - Negative values with leading minus, trailing minus, or parentheses.
   - Rounding up, down, or to nearest digit, from 0 to 18 decimal places.
   - Decimal position can be fixed or floating, or placed automatically.

 * Pull-down menus and over 50 help screens, including a complete online
   hypertext style reference manual.


 EXAMPLE #1
 ----------
 Mathematical operators and functions (actual tape output):

      --- Labels Column ---  --- Tape Column ---

     Add a column of numbers:+    123,456,789.12
                             +              2.22
                             +              3.33
     Subtotal                =    123,456,794.67
     Reverse sign    (line 7)=    123,456,794.67-
        <Clear>              C
     Algebraic expression    =          (1+2+3)*5
     Add that to the subtotal+             30.00
     Add 5% of that          +                 5%
     Subtotal       (line 12)=             31.50
     Line 7 + Line 12        =             L7+L12
                             =    123,456,763.17-
        <Clear>              C
     Subtotals and Totals    +              1.10
                             +              3.30
     First subtotal          S              4.40
                             +             10.00
                             +             30.00
     Second subtotal         S             40.00
                             +            200.00
     Show and clear total    T            244.40

     Adding a percentage     =             120+5%
                             =               126
     Multiply by percentage  =             120*5%
                             =                 6

                  --- MATH FUNCTIONS ----
     Square Root             =             SQR(2)
                             =          1.414214
     Modulus                 =       MOD(33,17.5)
                             =              15.5
     Logarithm base e        =          LN(e^e)/e
                             =                 1
     Delta Percent Change    =        DL(100,150)
        50% increase         =               0.5

                 ---- TRIGONOMETRIC ----
     Sine                    =          SIN(pi/2)
                             =                 1
     Arc Tangent             =            ATAN(1)
                             =          0.785398
     Sine of an angle        =      SIN(DTOR(90))
        given in degrees     =                 1


 EXAMPLE #2
 ----------
 Business and financial functions (actual tape output):

      --- Labels Column ---            --- Tape Column ---

     Present Value of $1,000 =             PV(1000,7.2%,10)
        in 10 years @ 7.2%   =                $ 498.944393

     Future Value of Annuity =               FVA(100,6%,10)
        $100 for 10 years, 6%=              $ 1,318.079494

     Loan Amount, 30 years,  =    LAMT(877.58,10%/12,30*12)
        10%, $877.58/month   =                $ 100,000.96

     Loan Payment per month  =    LPMT(100000,10%/12,30*12)
        $100,000, 10%, 30 yrs=                    $ 877.57

     Gross Profit Margin     +                  $ 1,000.00
        20% profit margin    +                GPM(1000,20%)
        Retail price         =                  $ 1,250.00


 EXAMPLE #3
 ----------
 This example shows an algebraic expression.  Note the use of the
 memory variables "XYZ", and "FUDGEFAC".  Memory variables are set
 with the F6 key (supported memory operators: M+, M-, M=, MC).

     INV(SQR(ABS(-3*7))+SIN(XYZ)^3)*(FUDGEFAC+4.1%)


 EXAMPLE #4
 ----------
 This example shows a checkbook, including bank reconciliation and
 an expense account summary, formatted with the REAL Numbers report
 writer.

     08/01/92            Checking Acct# 12511-4049            Page: 1 
                           Pacific Western Bank

                    October Farm Account
                    --------------------
     10/01 OPENING BALANCE               $    1,219.22

     10/03 1344 Acme Supply / Fertilizer        823.56-
     10/03 1345 Joe's Tractor Repair            124.50-
     10/04 1346 VOID                              0.00
     10/04 1347 4 Corners Tool Shed              18.50-
     10/04 DEPOSIT - COOP Grain Advance       3,725.00
     10/07 1348 Sanchez, Cohen & Smith          137.18-
     10/09 1349 Mechanics Bank                  206.97-
     10/11 1350 Property Tax                  1,985.00-
     10/12 1351 Acme Supply / Pallets           359.20-
     10/13 DEPOSIT - Johnson pasture rent       750.00
     10/13 1352 Transfer to personal acct       950.00-
     10/15 1353 Central Hardware / Nails         17.33-
     10/15 1354 North State Power                87.88-
     10/18 DEBIT - Bank Service Fee              12.50-
     10/20 1355 County Grain Haulers            195.50-
     10/25 1356 Bouchard's Insurance            110.24-
                                         ------------- 
     10/27 ENDING BALANCE                $      665.86
                                         ============= 

     BANK RECONCILIATION
        10/18 Bank Balance                    1,348.13
        Uncleared Checks and Deposits           376.53-
                                         ------------- 
        Adjusted Balance                        971.60
        10/18 Book Balance                      971.60-
                                         ------------- 
        Difference                                0.00
                                         ============= 

     OCTOBER SUMMARY
        Debt Payments                    $      206.97-
        Personal draw                           950.00-
        Fertilizer                              823.56-
        Insurance                               110.24-
        Professional Fees                       137.18-
        Repairs                                 141.83-
        Supplies                                377.70-
        Taxes                                 1,985.00-
        Hauling and Transportation              195.50-
        Bank Fees                                12.50-
        Utilities                                87.88-
                                         ------------- 
     Total Expenses                      $    5,028.36-
     Opening Cash Balance                     1,219.22
     Receipts                                 4,475.00
     Ending Cash Balance                 $      665.86
                                         ============= 

 VERSION HISTORY
 ---------------

 VERSION 2.0 (and 1.1A)
 ----------------------
 1) New streamlined and simplified memory variable window.  Memory
    functions operate in a manner similar to memory registers found on
    pocket calculators.  Memory variables can be given useful names such
    as "SALES" or "VELOCITY".

 2) New file name and directory lookup dialog for entering file names
    and navigating directories.

 3) New Ten Key calculator emulation mode for fast data entry.  This
    feature is selectable on the Setup Menu.

 4) Tapes now display calculated results rather than formulas except
    in the edit window, similar to the way spreadsheets typically work.
    The new default behavior can be reversed with a selection on the
    Setup Menu.  Users may want to change existing tape files to display
    formulas in the prior manner.

 5) New shortcut menu accelerator keys can be used to jump to the menu
    bar.  The Alt key combinations are: Alt/F (Files menu), Alt/T (Tape
    menu), Alt/S (Setup menu), and Alt/R (Report menu).

 6) There are two new report writer commands for overriding the numeric
    format: !FD to set the number of digits after the decimal point and
    !F to display with a floating decimal format.

 7) There are numerous improvements in the user interface, including
    better use of color, a new end-of-tape marker, and other refinements.

 8) Help screens have been expanded and reorganized with more examples
    and better assistance for new users.

 9) The 'TS' operator is replaced by a new 'P' operator to print out the
    running total.  This complements the 'S'ubtotal and 'T'otal operators.

 10) Type ahead in the menus is allowed now, so that automated scripts
     can be created (with Desqview, etc.).

 11) Insert mode (from pressing the Insert key) now remains set in the
     tape Edit Window after moving to another line.

 12) The Home and End keys are now used to move the cursor to the beginning
     or end of the line being edited.

 13) A problem with the cosine function in certain cases has been fixed.

 14) A problem when entering memory variable names has been fixed.  The
     last character in the input window is now capitalized.

 15) A problem with the display when closing the Edit Window has been
     fixed.  This problem occurred with short (less than full height)
     tape windows.

 16) The startup identification screen is not displayed in the registered
     version.

 17) There is an order form file (ORDERME.DOC) that can be printed and
     filled in for registration convenience.


 VERSION 1.10
 ------------
 1) New File menu Export selection to save a tape in a file format that
    can be imported into Lotus spreadsheets, as well into many other
    popular programs.

 2) New 'T'otal, 'S'ubtotal, and 'TS' operators.  'S'ubtotal displays and
    clears the subtotal.  'T'otal displays the sum of previous subtotals
    and clears the total.  The 'TS' operator displays the total without
    clearing it (note 'TS' is replaced by 'P' operator in 2.0).

 3) New Tape menu Clear selection that clears the lines from a tape, while
    retaining the setup and configuration options.

 4) A problem with Automatic Decimal placement in numbers has been fixed.
    Use the 'D'ecimal selection on the Setup menu to turn on the automatic
    decimal feature.

 5) A problem with line value references has been fixed.  Line values
    allow you to use the value from another line.  For example, L17 refers
    to the value of line 17.

 6) Performance improvements, including better use of background
    recalculation.

 7) The Help screens have been expanded and reorganized with more examples
    and better assistance for new users.

 8) The demonstration tapes (DEMO1, DEMO2, DEMO3) have been modified to use
    the new features in this release.

 9) The program now remembers whether the Edit Window in the tape is open
    when you move between the tape and the menu.

 10) The print file name for writing a report to a file can be changed
     at the point of starting the report, rather than having to go to the
     Report menu Options Setup selection first.

 11) The GPM (gross profit margin) function now works for mark downs
     (with a negative percentage), as well as for mark ups.

