1 ICALC
  Syntax: ICALC [expression] [ ; expression ]...

  ICALC is an interactive full-function calculator complete with
  full standard notation expressions and function library.

  ICALC has basic math, logical operators, math/trig functions, date
  functions, and named variables.

  If one or more expressions are entered on the command line, ICALC
  will display the results (one per line), then exit.

  If no expressions are entered, ICALC will enter interactive mode.

  A question-mark entered either on the command line or in interactive
  mode will display a summary screen.

2 Access
 Support:   minimal  to  none  (assistance as time and expertise allow)
 Contact:  e-mail to hornlo

  To get started using ICALC, type
      $ ICALC

2 Documentation
  A summary screen may be displayed by entering

    $ ICALC ?

!!   The full documentation for ICALC is in
!! 
!!     MIL_HELP:ICALC.DOC
!! 
!!   (this file may be TYPE'd or PRINT'd)
!! 
2 Copyrights&Authors
 The  following have copyright statements in one or more modules of the
 distribution.  Refer to the distribution for details.

    Free Software Foundation

  ICALC V2.2 by Rao V. Akella

 The  following are known to have authored, maintained, or modified one
 or more  modules  of  the  distribution.   See  the  distribution  for
 details.

  Rao V. Akella <rao@moose.cccs.umn.edu>
  Free Software Foundation (GNU software)
  Larry Horn <hornlo@okra.millsaps.edu>
  David Mathog <mathog@seqaxp.bio.caltech.edu>
  Jerome Lauret <jlauret@mail.chem.sunysb.edu>

  Modified David Mathog for up to 10 calculation in symbol (OpenVMS)
  J. Lauret 11-Mar-1999 
        Changed symbol calculation stack to 15 with stripped result.
        Added hypot() atan2(), rand(0) and ran2(0). Those 2 last functions 
         have been implemented based on numerical receipe function with a 
         random seed feeder.

2 OpenVMS
 This version of ICALC for OpenVMS adds the results of the calculations
 into a symbol ICALC_OUT.  This modification has  been  made  by  David
 Mathog.

2 Examples

  The following transcript of an ICALC session illustrates most of its features:

  IC> 4 + 4.5 - (34/(8*3+-3))
          6.880952381
  IC> -56 + 2
          -54
  IC> 3 ^ 2
          9
  IC> -3 ^ 2
          -9
  IC> 9 % 4
          1
  IC> 9.7 % 4.2
          1.3
  IC> pi = 3.141592653589
          pi = 3.141592654
          3.141592654
  IC> sin(PI)                  <- Note: Variable names are case-INsensitive.
          7.9326579347e-13     <- This is close enough to zero, don't you think?
  IC> x = (y = (z = 4.5)*2)*3  <- Note: Multiple variable assignments
          z = 4.5
          y = 9
          x = 27
          27
  IC> ln(y)
          2.197224577
  IC> exp(ln(y))
          9
  IC> uninitialisedvariable    <- Note: Uninitialised variables are 
                               <- automatically initialised to zero.
  IC> 1 & 2
          0
  IC> ~3
          -4
  IC> 0 | 1
          1
  IC> 9+4; 9-4; 9*4; 9/4
          13
          5
          36
          2.25
  IC> ?   /* help screen will be displayed */
  IC> sin(degtorad(90))
          1
  IC> radtodeg(asin(1))
          90
  IC> sin(degtorad(90))
          1
  IC> radtodeg(asin(1))
          90
  IC> caltojul(1992, 3, 16)
          149538
  IC> jultocal(149538)
          19920316        /* yyyymmdd format */
  IC> caltojul(1582, 10,15)
          1               /* October 15, 1582 is julian day 1 */
  IC> jultocal(1)
          15821015
  IC> floor(56.789)
          56
  IC> int(56.789)         /* trunc is an alias for int */
          56
  IC> floor(-56.789)
          -57
  IC> int(-56.789)
          -56

2 Arguments
  expression

    the mathematical expression to be evaluated -- multiple 
    expressions may be entered, separated by a semicolon

  ?

    a question mark will display a summary screen

  ^Z (ctrl/Z)

    exits ICALC