ÿÿÿÿBBBB INTRODUCTIONB THE DESIGNONBCOMMAND SUMMARYBBMODES OF OPERATIONSBSINGLE COMMAND MODEINTERACTIVE MODEBEXPRESSION COMMANDEBBASSIGNMENT COMMANDEB B  SHOW COMMAND B  B DISPLAY COMMANDA B  B   INPUT COMMANDNDA B  B   EXIT COMMAND B  COMMENT COMMANDA  DEBUG COMMANDNDA B   ALGEBRAIC EXPRESSIONS B   DATA TYPESEX DATA TYPE CONVERSION  CONSTANTS COB SYMBOLST ARITHMETIC OPERATORSB OPERATOR PRECEDENCESB MATH FUNCTIONSDE ABSH ACOSB ASINB ATAN CEILINGN COSL COSH EXPHB  FLTHB  FLOORNGN  INTO  LNTO  LOGO POWOB RANDB MAXD MIND MODD SEEDB SINDB SINH SQRT TANT TANH POSSIBLE FUTURE IMPROVEMENTSBB LOGICAL NAMES AND SYMBOLSNTSB %BUILD THE CALCULATOR FROM SOURCE CODEBB CALCULATOR SYNTAX DIAGRAMSSOBBBBBBBB EXPRESSION EVALUATION ALGORITHMEB