A multimedia effect can be provided by programs which use the hard disk drives of PCs. Knowledge Adventure and Science Adventure are two programs providing a multimedia experience without the use of CDROM. Knowledge Adventure provides information on general subjects while Science Adventure concentrates on science material with text taken from a book by Isaac Asimov. Information is accessed by placing the cursor on sections of the screen and clicking. Hyper jumps then occur, providing the user with different screens. The software offers graphics, text and sound, thus making them multimedia in nature. Asimov's Chronology of Science and Discovery is used as text but not in its entirety. Although not containing nearly as much information as a CDROM, the software provides an agreeable multimedia experience and could be used successfully as a reference source.