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 | ||
