At the launch of the MITS Altair 8800 in 1975, "Radio Electronics" magazine referred to the system as a "minicomputer", although the term microcomputer soon became usual for personal computers based on single-chip microprocessors. At the time, microcomputers were 8-bit single-user, relatively simple machines running simple program-launcher operating systems like CP/M or MS-DOS, while minis were much more powerful systems that ran full multi-user, multitasking operating systems, such as VMS and Unix, and although the classical mini was a 16-bit computer, the emerging higher performance superminis were 32-bit.