Back to the future: Here's a rundown of things your future grandkids will not believe were real:

-The Laser disc- As big as a vinyl LP, these monsters were only capable of holding one hour of a movie on each side.

-Beepers- They were like cell phones, but you couldn't actually talk to anyone.

-Film Cameras-  In the old days you had to wait for days to see the pictures you took. And, you couldn't even tweet them.

-Typewriters- Can you imagine life without a "delete" key?