classical period historyWhat are some inventions made during the Classical Period of history?

I am trying to make a timeline powerpoint presentation of inventions and regions made during the Classical Period of history. I need 10 slides for my project classical period historyand graphics, sounds, etc...so i need as much information as possible.
if you give the event,period and other details., I will try to collect and give you theclassical period history sources for this slide
If you are referring to the Greco-Roman period there was the steam engine and the water screw (Archimedes) an concrete (the Romans).