The functionality of Calculus`DSolveIntegrals` is now available in the built-in Mathematica kernel function DSolve.

All the functionality in Miscellaneous`Music` is now available through the newly created Music Package. Scale is now available as MusicScale.

Arithmetic[] gives a list containing the number of digits of precision, the base, and the options and option values of the arithmetic currently in effect.

MachineIntegerQ[expr] returns True if expr corresponds to a machine-sized integer, and False otherwise.

$MaxMachineInteger gives the maximum integer that is represented internally as a single atomic data element on your computer system.

EquationTrekkerNonModal is the nonmodal dialog version of EquationTrekker.

The Experimental Functions Package contains functions that are being considered for official inclusion in future versions of Mathematica.

GF[p, d] gives the Galois field that is a degree d extension of the prime field of p elements.GF[q] gives the Galois field with q elements, for q a prime power.GF[p, ilist] ...

PowerList[f] gives a list of the data parts of the nonzero elements of the field f.

PowerListQ[f] gives True if the list representing the powers of a primitive element of the field is used to do field arithmetic, and False otherwise.