Still shrinking the line of TACs, Motorola unveiled the first clamshell mobile phone with StarTAC. It improved the folding feature by collapsing in half, which is why it's called "clamshell"—because it resembles a clam opening and closing shut... It's said to be inspired by the communicator from the original Star Trek series.
I never knew that, but there's certainly a resemblance.
It truly is amazing how science fiction -- from Arthur C. Clarke's idea of geosynchronous orbit to modern design principles -- has influenced the world in which we live.