there was first a stone they called a reading stone then they made triangler type of glasses over the years glassesd have become better looking and much more practical to use
many improvement have been made over years
a lot
More and newer technology has been made and it improves the cars immensely
the tpwrietyer has been tenrud itno a cepomtur oevr tmie.................
It has been able to play videos and have bigger GB.
the futher improvements that will be made to the ipod could be water proof and no headphones needed
tacos
kuf
before time they didnt have washing machines they used scrubbing boards
everything has changed on the ipod
different materials
One of the improvements that has been made to the calculator since the invention of the device is that calculators are much smaller now. Another improvement is that many of them are solar powered.