Upgrading from:

NumericalMath`Microscope`

All the functionality of NumericalMath`Microscope` is now available in the newly created Computer Arithmetic Package.
The function Microscope has been renamed MicroscopePlot.
The function MicroscopicError has been renamed MicroscopicErrorPlot.

To access functionality from the new Computer Arithmetic Package, load ComputerArithmetic`:

Version 5.2 Needs["NumericalMath`Microscope`"]; MachineError[Sqrt[x], x -> 49 Pi/50]

Logarithm evaluated at machine numbers near 7:

Version 5.2 Needs["NumericalMath`Microscope`"]; Microscope[Log[x], {x, 7}, PlotJoined -> False]