?
to keep track of an experiment
to keep track of scientific chemicals!
By keeping documents and writing things that is important and needs to keep track with.
ecologist
You can try to keep a guest book or there are visitor management systems like a lobby track software.
Almost always but at the same time far less informative.
Organization believe it or not some of the smartest people in the world are not very organized.
Restaurant systems are operating systems that information is stored on like a computer. They keep track of your sales and what kinds of food your establishment sells and the prices of it.
POS (Point of Sales) systems in restaurants to keep track of customer orders in an itemized fashion. They allow the bills to be separated if need be as well.
Unfortunately, this is impossible to answer since there is no way to keep track of which homes have alarms.
Keep track from where though?
He keep track of the stars' postitions.