Sharp X68000, often known as X68K, was a personal computer sold only in Japan. The first model was launched in 1987, with a microprocessor Motorola 68000 to 10 megahertz, a megabyte of random access memory (RAM) and without hard disk, while the last model was launched in 1993 with a microprocessor Motorola 68030 to 25MHz, 4MB of RAM and a disc du Optional 80MB SCSI ro. The RAM memory in these systems could be increased up to 12 MB.