Once upon a time there were flimstrip projectors and an LP which emitted a beep when it was time to change the pic - then there were VGTs in hull defilade stacked next to an overhead projector - and now it's a laptop w/projector and endless PPTs. Wonder what's next - an R2D2 unit with a holographic display function? 
For those stuck in a staff or school house, there's this fabulous resource:
http://www.cafepress.com.au/sldotcom/456583
Richard's $.02 
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“Sometimes the Bible in the hand of one man is worse than a whisky bottle in the hand of (another)… There are just some kind of men who – who’re so busy worrying about the next world they’ve never learned to live in this one, and you can look down the street and see the results.” - To Kill A Mockingbird (Atticus Finch)
“Almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so.” - Robert Heinlein
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