Toshiba T1100

Toshiba T1100
Toshiba T1100, discolored
ManufacturerToshiba
Release date1985 (1985)
Introductory priceUS$1,899 (equivalent to $5,550 in 2024)
Operating systemMS-DOS 2.11
CPUIntel 80C88 @ 4.77 MHz
Memory256 KB RAM (upgradable to 512 KB)
StorageInternal 3.5" floppy drive, 720 KB; external 5.25" floppy drive, 360 KB
DisplayMonochrome LCD / Text mode: 80×25
Graphics640×200 (CGA)
InputKeyboard 83 keys, QWERTY
Weight4.1 kg (9.0 lb)
SuccessorToshiba T1200

The Toshiba T1100 is a laptop manufactured by Toshiba in 1985, and has subsequently been described by Toshiba as "the world's first mass-market laptop computer". Its technical specifications were comparable to the original IBM PC desktop, using floppy disks (it had no hard drive), a 4.77 MHz Intel 80C88 CPU (a lower-power variation of the Intel 8088), 256 KB of conventional RAM extendable to 512 KB, and a monochrome LCD capable of displaying 80x25 text and 640x200 CGA graphics. Its original price was US$1,899 (equivalent to $5,550 in 2024).

The T1100 PLUS is a later model of this laptop, released to the market in 1986. Some significant differences to the T1100 are: 16-bit data bus 80C86 CPU, 7.16 MHz or 4.77 MHz operation, 256 KB of conventional RAM (16-bit) extendable to 640 KB, and two internal 720 KB 3.5" diskette drives.

The T1100 was named an IEEE Milestone in 2009.