The portable iBook clamshell laptop (1999) continued the design revolution Apple started with the iMac G3 just a year prior. Both were playful, colorful, and, in Jobs’ words, even "lickable." | Computer History Museum

Clamcase Turns Your iPad Into A Laptop

Open clamshell packaging in seconds with this trick

Foldable iPhone to Feature a Clamshell Design, Cost Less Than Competing Devices, but May Arrive Much Later in the Market

Flip phones' resurrection with foldable display may beat the Galaxy Fold or Mate X designs

Definition of clamshell device