Microsoft PowerPoint presentations may include animated sequences and visual effects that cannot be easily duplicated by static images.
PostScript, PDF, or TeX's DVI format may be more convenient to print out copies of the presentation.
To listen to audio of the entire talk, make a choice from the sound menu (at left). Otherwise, select a section from the pictures menu and you will be offered the audio that goes with it (if available). You will need a player for the desired format (and speakers, a soundcard, operating system drivers, etc.). More help is available.
Select a thumbnail from the menu on the left; The large version will appear here. If the image is too big, you may wish to resize your browser window or adjust the width of the menu.