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2. Density (computer storage) - Wikipedia

   en.wikipedia.org/wiki/Density_(computer_storage)

   The first magnetic tape drive, the Univac Uniservo, recorded at the density of 128 bit/in on a half-inch magnetic tape, resulting in the areal density of 256 bit/in 2. [6] In 2015, IBM and Fujifilm claimed a new record for the magnetic tape areal density of 123 Gbit/in 2 , [ 7 ] while LTO-6 , the highest-density production tape shipping in 2015 ...

3. Blu-ray - Wikipedia

   en.wikipedia.org/wiki/Blu-Ray

   Pre-recorded Blu-ray Disc titles usually ship in packages similar to, but slightly smaller (18.5 mm shorter and 2 mm thinner: 135 mm × 171.5 mm × 13 mm [138]) and more rounded than, a standard DVD keep case, generally with the format prominently displayed in a horizontal stripe across the top of the case (translucent blue for Blu-ray video ...

4. Hubble Space Telescope - Wikipedia

   en.wikipedia.org/wiki/Hubble_Space_Telescope

   The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy.

5. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   This is the issue of color rendition, quite separate from color temperature. An orange or cyan object could appear with the wrong color and much darker as the LED or phosphor does not emit the wavelength it reflects. The best color rendition LEDs use a mix of phosphors, resulting in less efficiency and better color rendering. [citation needed]