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2. Density (computer storage) - Wikipedia

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

   Compact discs (CDs) offer a density of about 0.90 Gbit/in 2, using pits which are 0.83 micrometers long and 0.5 micrometers wide, arranged in tracks spaced 1.6 micrometers apart. DVD disks are essentially a higher-density CD, using more of the disk surface, smaller pits (0.64 micrometers), and tighter tracks (0.74 micrometers), offering a ...

3. Disk density - Wikipedia

   en.wikipedia.org/wiki/Disk_density

   Double density (DD) 3½-inch disks use an iron oxide coating, just as with 5¼-inch DD/QD disks. However, drives utilize stronger 670-oersted write heads and a narrower track width of 0.115 mm (0.0045 in) for a density of 135 tpi and 8,717 bpi. High density (HD) 3½-inch disks switch to a cobalt disk coating, just as with 5¼-inch HD disks ...

4. 19-inch rack - Wikipedia

   en.wikipedia.org/wiki/19-inch_rack

   A standard 19-inch server rack cabinet is typically 42u in height, 600 millimetres (24 in) wide, and 36 inches (914.40 mm) deep. [18] This comprises a volume of 974 L, or just under a cubic meter. Newer server rack cabinets come with adjustable mounting rails allowing the user to place the rails at a shorter depth if needed.

5. List of floppy disk formats - Wikipedia

   en.wikipedia.org/wiki/List_of_floppy_disk_formats

   High 2 80 18 512 1,440 kB 300 MFM [NB 4] Apple Lisa: 5 1 ⁄ 4 inch FileWare: Double 2 46 Variable (15-22) 512 soft 851 kB 218 - 320 [19] GCR Apple Lisa 2/Macintosh XL, Macintosh 3 1 ⁄ 2 inch Double 1 80 Variable (8-12) 512 soft 400 kB 394 - 590 GCR Apple Macintosh 2 800 kB High 2 80 18 512 1,440 kB 300 MFM Atari 8-bit: 5 1 ⁄ 4 inch Single ...

6. The Potentially Fatal Tick-Borne Illness You Haven't ... - AOL

   www.aol.com/lifestyle/potentially-fatal-tick...

   Alpha-gal syndrome, a tick-borne illness, is shaping up to be the new Lyme disease. Learn more about the disease and why it has doctors perplexed.

7. Why are Americans obsessed with a white Christmas ... - AOL

   www.aol.com/news/why-americans-obsessed-white...

   Updated December 16, 2024 at 12:40 PM Americans are obsessed with a white Christmas and all the trimmings – snow, icicles, sleigh rides, frost on windowpanes, cuddling up by the fire, mittens ...