Digital Data:

    How much space does it take?

? Byte      (1 byte) A single character
? Kilobyte  (1,000 bytes) A very short story
? Megabyte  (1,000,000 bytes) A small novel
? Gigabyte  (1,000,000,000 bytes) A pickup truck filled
  with paper
? Terabyte  (1,000,000,000,000 bytes) All the X-rays in
  a large hospital
? Petabyte  (1,000,000,000,000,000 bytes) All of NASA's
  earth science data
? Exabyte   (1,000,000,000,000,000,000 bytes) All words
  ever spoken
? Zettabyte (1,000,000,000,000,000,000 bytes) As much
  information as there are grains of sand in the world
? Yottabyte (1,000,000,000,000,000,000,000 bytes) As much
  information as there are atoms in 7,000 people.

... The older I get, the better I used to be.