Easing - transition from variable to another smoothly in a set time
-easings in comp sci can be traced back to Robert Penner
-easings.net
Simulation - use physics / other rules to determine next frame for one or more objects.
Timelines - schedule code for execution in the future
-setInterval() in javascript
-greenSock
Quartz clock mechanism
-can hack to send different pulse through microcontroller and change timekeeping from clocktime