Toshiba launched the Rupo JW04N in July 1993 as a lightweight A4-sized notebook word processor aimed for use on the road. Besides its compact size, Toshiba engineered the JW04N to run on NiMH batteries or regular dry cells and furnished it with a card-based modem for communications and a portable thermal transfer personal printer to make it suitable for road use.
With a 297 x 210 x 39.5 millimeter form factor — exactly the same size as an A4 sheet, the JW04N was 20 percent smaller than its predecessors, and weighing just 1.8 kilograms, it was 30 percent lighter. For greater mobility, it could run on a NiMH battery pack (seven hours of operating time) or alkaline dry cells (six AA batteries) as well as on regular AC power. The IC card slot allowed a 2400 bps card modem to fit perfectly in the unit. The modem enabled users to send and receive documents between word processors and to access searchable commercial database services offering newspaper and magazine articles and corporate data.
Toshiba also boosted the JW04N’s word processing features. A number of innovations were made to raise the input efficiency, including neuro-learning, which learned word pairs as AI candidate words, a corporate name dictionary with more than 1,900 company names, and a method for converting entries into katakana for katakana words not listed in the dictionary. The JW04N could also display vertical text, which made it easier to visualize the format of vertical text documents while editing.
|External dimensions [mm] and weight||297 x 210 x 39.5 (w x d x h), 1.8 kg|
|Power supply(continuous operating time)||AC adaptor: 100 VAC, 50 / 60 Hz|
|Alkaline dry cells: six AA batteries (~eight hours of operating time)|
|Rechargeable NiMH battery pack: 7.2 VDC, 1100 A/h (~seven hours of operating time)|
|Display device||Backlit two-way white LCD screen|
|40 characters x 20 lines (horizontal display)
22 characters x 26 lines (vertical display)
Whole paragraph conversion
Conversion dictionary: 381,000 words (basic dictionary: 97,300 words; family name dictionary: 96,000 names; corporate name dictionary: 1,900 names; proper noun dictionary: 12,000 words, etc.)
AI conversion: 400,000 candidate words
|User-defined dictionary||2,000 words|
|Document length||Long document: 48,000 characters, normal document: 16,000 characters|
|Print function||Contoured outline fonts (Mincho, Gothic)|
|Other functions||Electronic organizer, data processing (spreadsheets, graphs, MS-DOS text conversion)|