JWST is to be launched in October 2018. It is then time to start getting 
familiar with its main features and to plan its exploitation ahead of time. 
This talk is intended to provide information on the main characteristics of 
the telescope and its instrumentation, and on its main science topics. 
I will briefly summarise the scientific projects that the international 
community is likely to propose, and the timescales for the applications 
at the various Observing Cycles.