Logging data to arduino internal memory

Semi-noob here.

I was wondering... is it possible to log sensor data on the arduino (uno) board's internal memory, without using any SD shield or the like? I'm aware that the internal memory is not exactly huge, but can this generally be done?

Thanks, peace, Mat

but can this generally be done?

As long as you don't mind loosing the data when the Arduino looses power, and you are aware that the Arduino does not have a lot of memory.