The NEC PC-6600 Series were a lineup of

personal computer A personal computer (PC) is a multi-purpose microcomputer whose size, capabilities, and price make it feasible for individual use. Personal computers are intended to be operated directly by an end user, rather than by a computer expert or tech ...

s produced by the

NEC Corporation is a Japanese multinational information technology and electronics corporation, headquartered in Minato, Tokyo. The company was known as the Nippon Electric Company, Limited, before rebranding in 1983 as NEC. It provides IT and network soluti ...

in 1985. They were essentially a PC-6001 MK2 with a built-in 3.5"

floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, or a diskette) is an obsolescent type of disk storage composed of a thin and flexible disk of a magnetic storage medium in a square or nearly square plastic enclosure lined ...

drive. Two models in this series were produced: the PC-6601 and the PC-6601 SR.

References

OLD-COMPUTERS.COM: The Museum: NEC PC 6601

PC-6601 The NEC PC-6600 Series were a lineup of personal computers produced by the NEC Corporation in 1985. They were essentially a PC-6001 MK2 with a built-in 3.5" floppy disk A floppy disk or floppy diskette (casually referred to as a floppy, or ...