Calculator Functions:

  CALCINIT()     Set calculator color or color tables
  CALCPOS()      Set calculator initial screen position
  CALCDEC()      Predefine calculator decimal positions
  CALCUDF()      Set calculator key handler block.
  CALCMEMORY()   Get/Set calculator static memory
  CALCPRINT()    Set calculator printing status (normal, hold, hold all)
  CALCPTAPE()    Get/Set Calculator printing tape
  CALCREG()      Register the On-screen Full-Function Calculator
  CALCLANGUAGE() Change the Calculator Language (ENGLISH/SPANISH/GERMAN)
  CALCULATOR()   On-screen Full-Function Calculator

 Trigonometrical Functions:

  SIN()          SINE of a degree
  SINR()         SINE of a radian
  COS()          COSINE of a degree
  COSR()         COSINE of a radian
  TAN()          TANGENT of a degree
  TANR()         TANGENT of a radian
  ASIN()         ARCSINE in degrees of a sine value
  ASINR()        ARCSINE in radians of a sine value
  ACOS()         ARCCOSINE in degrees of a cosine value
  ACOSR()        ARCCOSINE in radians of a cosine value
  ATAN()         ARCTANGENT in degrees of a tangent value
  ATANR()        ARCTANGENT in radians of a tangent value
  PI()           Return the value of PI
  FACTORIAL()    Return the value of a factorial
  INVLOG()       Inverse logarithm
  DTOR()         Convert degrees to radians
  RTOD()         Convert radians to degrees
  SIGN()         Return the sign of a number
  CSC()          COSECANT of a degree
  CSCR()         COSECANT of a radian
  SEC()          SECANT of a degree
  SECR()         SECANT of a radian
  COT()          COTANGENT of a degree
  COTR()         COTANGENT of a radian