Progress only comes close to this portable device. Portable - it's not when very small. A truly portable - this is when it can crush, put as you like, though in a roll to roll and put into the little box ©.
Here is the keyboard - a truly portable. Although that is the size of a standard keyboard, 104 keys and layout QWERTY, this keyboard can be folded into a ram's horn, and when folded takes up little space. So that it can carry around in your bag or backpack without fear that it will break.