It's about two-fifths as much as The Amazon.com's databases.
In other words, 18,000 gigabytes is 0.4154070 times the amount of The Amazon.com's databases, and the amount of The Amazon.com's databases is 2.407280 times that amount.(largest databases only; 2005 figures)
Amazon.com maintains information on the millions of items sold on it's e-Commerce website and the websites of its affiliate companies, as well as information on customer orders and browsing history, and excerpts from nearly a quarter-billion books in databases totaling an estimated 44,370.90 gigabytes of data. Amazon.com receives over 615 million visits to its US website each year.
It's about three times as much as a Gap, Inc. Customer Database.
In other words, the amount of a Gap, Inc. Customer Database is 0.30 times 18,000 gigabytes.(a.k.a. The GAP Companies, a.k.a. Gap) (2012 figures)
The GAP Inc., the corporate parent of GAP store, Old Navy, and Banana Republic, has accumulated over 7,000 gigabytes of data on almost a billion customers. The GAP, Inc remains the largest apparel retailer in the United States and was the largest in the world from the mid-1990s until about 2008.
It's about one-fourth as much as The Google Earth database.
In other words, 18,000 gigabytes is 0.2490 times the amount of The Google Earth database, and the amount of The Google Earth database is 4.02 times that amount.(2006 figures) (raw imagery and indexes storage)
As of 2006, Google was storing 72,200 gigabytes of raw image and index data for its satellite photo and virtual globe application, Google Earth. The application offers high resolution satellite imagery of 60% of the populated areas of the world, according to 2010 estimates.
It's about four-and-a-half times as much as Watson.
In other words, the amount of Watson is 0.230 times 18,000 gigabytes.(data store only)
Watson, the IBM supercomputer famous for competing against humans on the televised trivia game show Jeopardy!, utilizes 4,100 gigabytes of variously-structured data to formulate answers. While "thinking", Watson processes about 500 gigabytes of data per second.
It's about one-fifth as much as The LHC Data Generated per Second.
In other words, the amount of The LHC Data Generated per Second is 5 times 18,000 gigabytes.(a.k.a. Large Hadron Collider) (2008 figures)
Capturing millions of measurements per second on millions of subatomic particles, the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) facility in Geneva generates 100,000 gigabytes of data every second. Data collection arrays are placed throughout the LHC's 8.6 km (5.3 mi) circular track.
It's about one-tenth as much as The Hubble Telescope.
In other words, 18,000 gigabytes is 0.140 times the amount of The Hubble Telescope, and the amount of The Hubble Telescope is 7.10 times that amount.(a.k.a. Hubble Space Telescope, a.k.a. HST) (2008 figures)
Between its launch in 1990 and 2008, the Hubble Space Telescope gathered 120,000 gigabytes of images and other data about astronomical phenomena. Last upgraded during a service mission in 1999, the onboard computer of the Hubble Telescope has just 0.002 gigabytes of operating memory (RAM) — less than most smartphones.
It's about one-tenth as much as Despicable Me.
In other words, 18,000 gigabytes is 0.1240 times the amount of Despicable Me, and the amount of Despicable Me is 8.06 times that amount.(2010) (Production data)
The 2010 digitally-animated film Despicable Me was developed by Illumination Entertainment and Mac Guff Ligne and used 145,000 gigabytes. The film had a running time of 95 minutes.