I found this on Facebook, I’m not sure who the original creator was.
The difference should now be clear.
A big thanks to Colin for putting me on to this YouTube channel. As we saw in today’s lesson computer images (digital) can be very large. In order to save space when we save them we must compress them. We can either do this in a lossless fashion or in a lossy fashion. With lossless you can always get back to the original without any corruption this is not possible in lossy compression.
[kml_flashembed movie="http://www.youtube.com/v/Lto-ajuqW3w" width="425" height="344" allowfullscreen="true" fvars="fs=1" /]
I must confess, I’m not sure where I got these notes from. Its a list of Comparision tables that compare the main elements of the computer systems unit. It’s very useful for the questions that ask for the relative advantages and disadvantages of key technologies.