price for the necessary hardware (and of course the capability of the OS). This was due in part to the aggressive pricing of the Commodore 64 as a games machine and home computer (With rebates, the C64 was going for as little as US$100 at the time). This was in comparison to a typical PC for US$2000 (which required MS-DOS, and another $99 for Windows 1.0) or the venerable Mac 512K Enhanced also $2000. There were numerous sound-editing tools for the Commodore 64. Commodore released music-composition software which included a keyboard overlay suited for early model Commodore 64s. Software titles such as the Music Construction Set were available for users to compose music with notes; however, the tools which maximized the C64's sonic capability were demoscene music tools or pure assembly language. MIDI expansion cartridges and speech-synthesizing hardware was also available for more serious musicians. The Prophet64 cartridge was recently released and features a suite of GUI-style applications for sequencing music, drum and rhythm synthesis, MIDI DIN-sync, and taking advantage of the SID chip in other ways, effectively turning the C64 into a true musical instrument that anyone can use. There was also software which could be used to make the Commodore 64 speak, the best-known being SAM. The first screen shows the C64's BASIC with a small program. The BASIC interpreter not only allows the user to write programs, but it is also used as command prompt, so in order to load a program a BASIC command needs to be entered. KoalaPainter is an early paint program. It uses two screens. The first displays a menu and the second is the picture that is being worked on. The program is controlled either by a joystick or with a graphics tablet that was also sold by Koala. Magic Desk is an application by Commodore that resembles a real typewriter but contains basic editing functions. Multiplan is a text-based spreadsheet application written by Microsoft. Vizawrite is another text-based word processor for the C64, but it looks more like the professional word processors of the early 80s. GEOS was a graphical user interface, first released in 1987. It was a small revolution at its time because until then GUIs, other than Apple II Desktop/MouseDesk, were available mostly for the much more powerful 16-bit machines. geoPaint is a paint program for GEOS. Despite its lower resolution it had all the capabilities of other