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  2. List of electronic color code mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic_color...

    The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: 0 = Black; 1 = Brown; 2 = Red; 3 = Orange; 4 = Yellow; 5 = Green; 6 = Blue; 7 = Violet; 8 = Gray; 9 = White; Easy to remember. A mnemonic which includes color name(s) generally reduces the chances of confusing black and brown.

  3. Electronic color code - Wikipedia

    en.wikipedia.org/wiki/Electronic_color_code

    A 2.26 kΩ, 1%-precision resistor with 5 color bands (), from top, 2-2-6-1-1; the last two brown bands indicate the multiplier (×10) and the tolerance (1%).. An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others.

  4. Trolleybuses in Greater Boston - Wikipedia

    en.wikipedia.org/wiki/Trolleybuses_in_Greater_Boston

    The first trackless trolley line in the Boston transit system was opened by the Boston Elevated Railway (BERy) on April 11, 1936. Replacing a streetcar line over the same route, it was a crosstown line (later numbered 77, and today served by the 69 bus) running from Harvard station east to Lechmere station. (Substitution of buses for streetcars ...

  5. Boston-area streetcar lines - Wikipedia

    en.wikipedia.org/wiki/Boston-area_streetcar_lines

    Boston-area streetcar lines remaining in 1940 (in green), plotted against a map of the BERy's subway and elevated lines (in purple). The shade of green for each line denotes how long the line lasted after this; the lightest-green lines were abandoned in 1945 or earlier, the second-lightest lines were abandoned from 1946 to 1950, the second-darkest lines were abandoned from 1951 to 1969, and ...

  6. Streetcars in North America - Wikipedia

    en.wikipedia.org/wiki/Streetcars_in_North_America

    North America's first streetcar lines opened in 1832 from downtown New York City to Harlem by the New York and Harlem Railroad, in 1834 in New Orleans, and in 1849 in Toronto along the Williams Omnibus Bus Line . These streetcars used horses and sometimes mules. Mules were thought to give more hours per day of useful transit service than horses ...

  7. 25-pair color code - Wikipedia

    en.wikipedia.org/wiki/25-pair_color_code

    A common application of the 25-pair color code is the cabling for the Registered Jack interface RJ21, which uses a female 50-pin miniature ribbon connector, as shown in the following table. The geometry of the pins of the receptacle (right hand image) corresponds to the pin numbers of the table.

  8. MBTA subway - Wikipedia

    en.wikipedia.org/wiki/MBTA_subway

    MBTA subway. The Massachusetts Bay Transportation Authority (MBTA) operates rapid transit (heavy rail), light rail, and bus rapid transit services in the Boston metropolitan area, collectively referred to as the rapid transit, subway, or the T system. [2]

  9. Color code - Wikipedia

    en.wikipedia.org/wiki/Color_code

    25-pair color code chart used in certain kinds of wiring. A color code is a system for encoding and representing non-color information with colors to facilitate communication. This information tends to be categorical (representing unordered/qualitative categories) though may also be sequential (representing an ordered/quantitative variable).