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Macintosh Picture Format  |  1993-12-08  |  12.1 KB  |  640x480  |  8-bit (37 colors)  |  [PICT/ppxi]
   ocr: Physical Layer: Signals Electrical Signals (EIA definitions Unbalanced Signals (2wire) RS-232C Used at low speeds =<19.2 Kbps Balanced Signals (4 - - wire) RS-422 (CCITT - - V.11) Used for speeds S>= 48 Kbps Wide Area Networking Fechlarationgf Sndependence