The folks at Mozy have posted a wonderful graphic explaining the concept of a petabyte (a million gigabytes) — and noting that the company now stores more than 15 petabytes of data:

"13.3 years of HDTV content — that's approximately 58,292 movies, which means an equal number of large pizzas," notes Gizmodo's Jesus Diaz. "So one petabyte equals 52 tonnes of pepperoni pizza. Yes, my head has assploded…"