Oscilloscopes include analysis tools like fast Fourier transform (FFT) and histograms, which provide alternative views of waveform data. FFTs add the frequency domain view, while histograms provide an entry into statistical analysis. Viewing data in the statistical domain can provide great insight into the underlying processes behind a waveform or set of measurements.
In his article
How to perform histogram analysis on your oscilloscope on EDN, Arthur Pini takes you through histogram basics (including how one is created), and he gives examples of jitter measurements and timing analysis.
If scopes are your thing, you might also like to see Calculating power with a scope and Scoping out the latest in oscilloscopes.