Toshiba_T1000
The Toshiba T1000 is a discontinued laptop computer manufactured by the Toshiba Corporation in 1987. It has a similar specification to the IBM PC Convertible, with a 4.77 MHz 80C88 processor, 512 KB of RAM, and a monochrome CGA-compatible LCD. Unlike the Convertible, it includes a standard serial port and parallel port, connectors for an external monitor, and a real-time clock.
Unusually for an IBM compatible PC, the T1000 contains a 256 KB ROM with a copy of MS-DOS 2.11. This acts as a small, read-only hard drive. Alternative operating systems can still be loaded from the floppy drive, or (if present) the RAM disk.
Along with the T1200 and earlier T1100, the Toshiba T1000 was one of the early computers to feature a "laptop" form factor and battery-powered operation.