A pretty run of the mill Mac with an strange feature was the Powerbook 1400 and its "BookCover." The BookCover was a section of the lid that could be replaced w

A pretty run of the mill Mac with an strange feature was the Powerbook 1400 and its "BookCover." The BookCover was a section of the lid that could be replaced with clear plastic to display something thin underneath, such as art. Apparently a photovoltaic BookCover was offered by Keep It Simple Systems. https://www.macworld.com/article/224852/three-cheers-for-the-delightfully-personal-powerbook-1400-with-bookcover.html https://www.macworld.com/article/224852/three-cheers-for-the... Picture of PV BookCover: https://www.flickr.com/photos/21647187@N04/4712178648/in/photostream/ https://www.flickr.com/photos/21647187@N04/4712178648/in/pho...