They have changed many times like from being sun dials to wall clocks to digital watches.
Albert Lukas Müller in 1740
In 1577, Jost Burgi invented the minute hand. Burgi's invention was part of a clock made for Tycho Brahe, an astronomer who needed an accurate clock for his stargazing.
They were made in Europe, and were installed by Smith's Bell and Clock in Mooresville, IN
its been made in different types in different countries over about the last 500 years
it was made about 30,000 years ago
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
kuf
tacos
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.