What is the difference between a seismograph and a seismogram

The difference between a seismograph and a Seismogram is that:

a Seismograph is referred to a tool or instrument used in measuring the magnitude or effect of an earth quake

While

Seismogram is a type of output report or data that is generated out of a seismograph.

So in summary, a Seismograph is an instrument or tool while Seismogram is an output data generated from the usage of a seismograph.