【Hitachi】 BW-LH550

Hitachi announced the BW-LH550 word processor in 1992. The BW-LH550 was the first laptop word processor with an internal hard drive. It ran on an 80C286 CPU for quick processing speeds.

Feature list

  • (1)Standard equipped with enhanced drawing and graphing functions
  • (2)A 40 MB fixed disk drive in a laptop configuration
  • (3)Included a personal name, place name, and postal code dictionary and an English dictionary
  • (4)Modeless character-entry method that automatically recognized input mistakes
  • (5)Supported printing of scaled fonts from 7 to 30 points when connected to a laser printer
  • (6)Supported up to five typefaces
  • (7)Icon-based menu system for quick operation selection
  • (8)One-step key function allowed the user to assign frequently used functions to the function keys to simplify complex operations into one-step operations
  • (9)Standard support for bidirectional conversion with MS-DOS files
  • (10)Support for the optional spreadsheet system gave the BW-LH550 data processing capability on par with standard computers
Input device Keyboard JIS standard (with an additional 10 keys)
Display device Screen Backlit, monochrome LCD 640 x 400 pixels
Display size 40 characters x 21 lines
(four lines reserved for system use)
27 characters x 15 lines
(four lines reserved for system use)
Character size 16 x 16 pixels 24 x 24 pixels
Storage devices Drives One 3.5-inch floppy drive (1.6 MB) One 3.5-inch fixed disk drive (40 MB)
Capacity Compatibility Level 1: ~250 pages/disk
Compatibility Level 2: ~180 pages/disk
(850 characters/page, A4)
Standard: ~2,500 pages
Max.: ~5,250 pages
(850 characters/page, A4)
External dimensions [mm] and weight Unit 385 x 301 x 90 (w x d x h), ~6 kg
Power consumption 100 ± 10 VAC, 28 W, 50/60 ± 1 Hz