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A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...
Universal Numbering System. Universal numbering system. This is a dental practitioner view, so tooth number 1, the rear upper tooth on the patient's right, appears on the left of the chart. The Universal Numbering System, sometimes called the "American System", is a dental notation system commonly used in the United States. [ 1][ 2]
The periodic table is a tabular arrangement of the chemical elements, organized by their atomic number, electron configuration, and chemical properties. It is a useful tool for understanding the patterns and trends of the elements and their interactions. Learn more about the history, structure, and significance of the periodic table on Wikipedia.
Main article: list of numeral systems. Decimal: The standard Hindu–Arabic numeral system using base ten. Binary: The base-two numeral system used by computers, with digits 0 and 1. Ternary: The base-three numeral system with 0, 1, and 2 as digits. Quaternary: The base-four numeral system with 0, 1, 2, and 3 as digits.
ColorChecker. The ColorChecker Color Rendition Chart (often referred to by its original name, the Macbeth ColorChecker[ 1] or simply Macbeth chart[ 2]) is a color calibration target consisting of a cardboard-framed arrangement of 24 squares of painted samples. The ColorChecker was introduced in a 1976 paper by McCamy, Marcus, and Davidson in ...
1967. 1968. 1969. 1970s →. The Beatles earned the most number-one hits (18 songs) and remained the longest at the top of the Billboard Hot 100 chart (55 weeks) during 1958–1969. Elvis Presley remained at the top of the Billboard number-one singles chart for 22 weeks during 1958–1969. The Supremes scored 12 number-one singles during 1958 ...
Eventually, streaming was incorporated into the sales chart. Graph showing number of UK number-one singles for each year since 1953. The 2011 figure is projected. Al Martino's track "Here in My Heart" was the first single ever to top the UK Singles Chart, and the only single to reach number one during 1952.
List of UN numbers 2001 to 2100. List of UN numbers 2101 to 2200. List of UN numbers 2201 to 2300. List of UN numbers 2301 to 2400. List of UN numbers 2401 to 2500. List of UN numbers 2501 to 2600. List of UN numbers 2601 to 2700. List of UN numbers 2701 to 2800. List of UN numbers 2801 to 2900.