The low-end model was sold with 1 MB of memory, a 1.44 MB floppy drive, no hard disk, and included a keyboard for $999. The $1,500 model used 2 MB memory and a 40 MB hard disk. The Classic features several improvements over the Macintosh Plus, which it replaced as Apple's low-end Mac computer: it is up to 25 percent faster than the Plus, about as fast as the SE, and includes an Apple SuperDrive 3.5" floppy disk drive as standard. The SuperDrive can read and write to Macintosh, MS-DOS, OS/2, and ProDOS disks. The classic also has an expansion slot that is only for memory (up to 10 MB) and/or a 68882 FPU.