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  2. Isotopes of gold - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_gold

    Gold is currently considered the heaviest monoisotopic element. Bismuth formerly held that distinction until alpha-decay of the 209 Bi isotope was observed. All isotopes of gold are either radioactive or, in the case of 197 Au, observationally stable , meaning that 197 Au is predicted to be radioactive but no actual decay has been observed.

  3. ColorChecker - Wikipedia

    en.wikipedia.org/wiki/ColorChecker

    "ColorChecker RGB Summaries, Spreadsheets and Lab TIFF File". brucelindbloom.com. A page showing RGB values for color patches in various RGB color spaces, based on the applet described above, and a set of Excel spreadsheets for comparing these numbers to those in a digital camera or scanner image of the ColorChecker.

  4. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    Some older 0800 numbers still in use have a shorter number length. The former 0500 freephone number range was withdrawn on 5 June 2017. In Ukraine, toll-free numbers have the "0 800" prefix, followed by 2 digits for the carrier code, then 4 digits for the client number - i.e., 0 800 YYXXXX. Before October 2009, the "8800" prefix was used.

  5. FRRouting - Wikipedia

    en.wikipedia.org/wiki/FRRouting

    Free Range Routing or FRRouting or FRR is a network routing software suite running on Unix-like platforms, particularly Linux, Solaris, OpenBSD, FreeBSD and NetBSD. It was created as a fork from Quagga. FRRouting is distributed under the terms of the GNU General Public License v2 (GPL2).

  6. Munsell color system - Wikipedia

    en.wikipedia.org/wiki/Munsell_color_system

    The H (hue) number is converted by mapping the hue rings into numbers between 0 and 100, where both 0 and 100 correspond to 10RP. [7] As the Munsell books, including the 1943 renotation, only contains colors for some points in the Munsell space, it is non-trivial to specify an arbitrary color in Munsell space.

  7. Academy Color Encoding System - Wikipedia

    en.wikipedia.org/wiki/Academy_Color_Encoding_System

    a photographic exposure of an 18% grey card would map to (,,) RGB code value. ACES2065-1 code values often exceed for ordinary scenes, and a very high range of speculars and highlights can be maintained in the encoding. The internal processing and storage of ACES2065-1 code values must be in floating-point arithmetics with at least 16 bits per ...

  8. Grayscale - Wikipedia

    en.wikipedia.org/wiki/Grayscale

    This range is represented in an abstract way as a range from 0 (or 0%) (total absence, black) and 1 (or 100%) (total presence, white), with any fractional values in between. This notation is used in academic papers, but this does not define what "black" or "white" is in terms of colorimetry .

  9. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Zone 5 uses eight 2-digit codes (51–58) and two sets of 3-digit codes (50x, 59x) to serve South and Central America. Zone 6 uses seven 2-digit codes (60–66) and three sets of 3-digit codes (67x–69x) to serve Southeast Asia and Oceania. Zone 7 uses an integrated numbering plan; two digits (7x) determine the area served: Russia or Kazakhstan.