The slide show can be saved on disk and shown on another computer if
the other computer has the same or higher version of PowerPoint;
the presentation has been packaged to Pack and Go (File
menu, Pack and Go)
or
the presentation has been Saved as a Web Page and the other computer
has a recent version of Internet Explorer or Netscape. (This
feature is found in the latest version of PowerPoint 2000.)
On your computer, full details can be found in the Help menu under
Save.