Numeric Classes

<number>	[Abstract Class]
<real>	[Sealed Class]
<float>	[Sealed Class]
<single-float>	[Sealed Class]
<double-float>	[Sealed Class]
<extended-float>	[Sealed Class]
<rational>	[Sealed Class]
<ratio>	[Sealed Class]
<integer>	[Sealed Class]
<complex>	[Sealed Class]