  This paper summarizes the essential functionality of the computer algebra
package HarmonicSums. On the one hand HarmonicSums can work with nested sums
such as harmonic sums and their generalizations and on the other hand it can
treat iterated integrals of the Poincare and Chen-type, such as harmonic
polylogarithms and their generalizations. The interplay of these
representations and the analytic aspects are illustrated by concrete examples.

Symbolic Computation;High Energy Physics - Phenomenology