Hitachi announced the compact with me BF-1 personal word processor with a separate printer in 1991. The BF-1 weighed 1.8 kg and was just 29.7 millimeters thick.
Feature list
- （1）The 29.7 millimeter slim profile and A4 file size meant it could be carried under one arm
- （2）Easy-to-read backlit monochrome LCD screen
- （3）Modeless character-entry method that automatically recognized input mistakes
- （4）AI-based kana-kanji conversion with about 200,000 candidate words
- （5）70 character/second thermal transfer two-way printer that allowed horizontal printing as well
- （6）Optional personal name, place name, postal code software simplified character-entry conversions
- （7）Able to extend operating time by about three hours with the optional battery pack
- （8）Personal DTP functions enabled flexible layout editing of form postcards and other documents
- （9）Three body colors: bluish-gray, mist green, and apricot orange
| 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) | ||||
| Character size | 16 x 16 pixels | ||||
| Storage devices | Floppy drive | One 3.5-inch drive (1.6 MB) | |||
| Capacity | ~250 pages per disk (A4) Ten documents could also be stored on the system floppy disk | ||||
| Printer | Print process | Thermal transfer | |||
| Typefaces | Mincho | Mouhitsu | Gothic | Cursive | |
| Print head | 48 x 48 dots | ||||
| Character sizes | ~8 points, ~10.5 points, ~13 points | ||||
| Print speed | 35 characters/sec., 70 characters/sec. (48 x 48 dot characters) | ||||
| Paper sizes | Plain paper sizes (A4, A5, B4, B5), manuscript paper sizes (B4, A5), prepaid postcard size, refill paper size |
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| External dimensions [mm] and weight | Unit | 320 x 243 x 29.7 (w x d x h), ~1.8 kg | |||
| Printer | 345 x 113 x 62 (w x d x h), ~1.5 kg | ||||
| Power supply | Internal rechargeable NiCad battery (6 VDC) With dedicated AC adaptor: 100 ± 10 VAC, 24 W, 50/60 Hz |
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