The computer on which you create a presentation is usually not the same computer that you will use to show it. For example, you may be doing the bulk of your work on your desktop computer in your office in Los Angeles, but you need to use your laptop computer to give the presentation in Phoenix.
One way to transfer a presentation to another computer is simply to copy the PowerPoint file (the file with the .pptx extension) using a floppy disk or other removable media. However, this method is imperfect because it assumes that the other computer has all of the fonts, sounds, and other elements that you need for every part of the show. This can be a dangerous assumption. For example, suppose that your presentation contains a link to some Excel data. If you do not also copy the Excel file, then you cannot update the data when you are on the road.
A better way to ensure that you are taking everything you need while traveling is to use the Package for CD feature in PowerPoint. This feature reads all of the linked files and associated objects and ensures that they are transferred along with the main presentation. You do not actually need to copy the presentation to a writeable CD, and you do not need a CD-R or CD-RW drive to use this feature. You can copy the presentation to anywhere you want, such as to a ZIP drive or a network location.
If you have a CD-R or CD-RW drive, then copying the presentation to CD is ...