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  2. Class traitor - Wikipedia

    en.wikipedia.org/wiki/Class_traitor

    The motives behind becoming a traitor to one's class can include the necessity of survival (taking up whatever wage is available), the belief that the person is of a higher class and so has political views that work against the working class, the pressure of conformity, or a rejection of the view that society is divided up into antagonistic ...

  3. Class (set theory) - Wikipedia

    en.wikipedia.org/wiki/Class_(set_theory)

    A class that is not a set (informally in Zermelo–Fraenkel) is called a proper class, and a class that is a set is sometimes called a small class. For instance, the class of all ordinal numbers , and the class of all sets, are proper classes in many formal systems.

  4. J Class (yacht) - Wikipedia

    en.wikipedia.org/wiki/J_Class_(yacht)

    J Class yachts Velsheda, Topaz and Svea downwind legs. The J Class is one of several classes deriving from the Universal Rule for racing boats. The rule was established in 1903 and rates double-masted racers (classes A through H) and single-masted racers (classes I through S).

  5. Power amplifier classes - Wikipedia

    en.wikipedia.org/wiki/Power_amplifier_classes

    Class-B amplifiers are also favoured in battery-operated devices, such as transistor radios. Class B has a maximum theoretical efficiency of π/4 (≈ 78.5%). [15] A practical circuit using class-B elements is the push–pull stage, such as the very simplified complementary pair arrangement shown at right. Complementary devices are each used ...

  6. List of submarine classes of the United States Navy - Wikipedia

    en.wikipedia.org/wiki/List_of_submarine_classes...

    Submarines of the United States Navy are built in classes, using a single design for a number of boats. Minor variations occur as improvements are incorporated into the design, so later boats of a class may be more capable than earlier. Also, boats are modified, sometimes extensively, while in service, creating departures from the class standard.

  7. Class consciousness - Wikipedia

    en.wikipedia.org/wiki/Class_consciousness

    In Marxism, class consciousness is the set of beliefs that persons hold regarding their social class or economic rank in society, the structure of their class, ...

  8. A Touch of Class (group) - Wikipedia

    en.wikipedia.org/wiki/A_Touch_of_Class_(group)

    A Touch of Class (often shortened in initials as ATC) were an international Eurodance group based in Germany, although the four members each came from different countries [2] —Joseph "Joey" Murray from New Zealand, Sarah Egglestone from Australia, Livio Salvi from Italy, and Tracey Elizabeth Packham from England.

  9. List of Dewey Decimal classes - Wikipedia

    en.wikipedia.org/wiki/List_of_Dewey_Decimal_classes

    The Dewey Decimal Classification (DDC) is structured around ten main classes covering the entire world of knowledge; each main class is further structured into ten hierarchical divisions, each having ten divisions of increasing specificity. [1]