class Date;
- ---Purpose: Gets and sets values of date.
- -- This represents a point in time.
- -- So it deals with year,month,day,hour,minute,second,
- -- millisecond and microsecond.
class Period;
- ---Purpose: Gets and sets values of Period
- -- This allows management of an elapsed time.
-
-
class Color;
- ---Purpose: Definition and manipulation of colors.
-
class Convert;
- ---Purpose: Conversion units.
class Array1OfCoefficient instantiates