In the early 1990's, there was an industry trend to make laptops smaller and lighter. These socalled subnotebooks often resulted in a compromise between portability and practicality. Apple's PowerBook Duo series, however, tried to do everything.
Sources (in order of appearance):
AST Premium Exec laptop photo: https://openlab.citytech.cuny.edu/ret...
PC Magazine, April 14, 1992.
Toshiba Libretto photo: https://commons.wikimedia.org/wiki/Fi...
LGR's ThinkPad 701c video: • IBM ThinkPad 701C: The Iconic Butterf...
HP Omnibook 800CT photo: https://muzeuldecalculatoare.ro/2018/...
Compaq Contura Aero photo: / restored_compaq_contura_aero_433c_for_asm
PC Magazine, September 28, 1993.
Computerworld, August 15, 1994.
MacUser, December 1992.
Macworld, December 1992.
Macworld, December 1993.
Macintosh Duo System Developer Note, November 1992.
AAUI ThinNet transceiver photo: https://commons.wikimedia.org/wiki/Fi...
AAUI 10BaseT transceiver photo: https://commons.wikimedia.org/wiki/Fi...
The Apple Catalog, Spring 1993.
Macintosh Classic photo: https://commons.wikimedia.org/wiki/Fi...
MacUser, November 1995.
The Apple Catalog, Fall 1993.
MacUser, December 1993.
Duo battery charger photo: https://www.ebay.com/itm/APPLEM7778...
Duo 270c upgraded to 2300 photo: https://www.flickr.com/photos/kenleew...
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