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  2. Character encodings in HTML - Wikipedia

    en.wikipedia.org/wiki/Character_encodings_in_HTML

    First, the web server can include the character encoding or " charset " in the Hypertext Transfer Protocol (HTTP) Content-Type header, which would typically look like this: [1] Content-Type: text/html; charset=utf-8. This method gives the HTTP server a convenient way to alter document's encoding according to content negotiation; certain HTTP ...

  3. List of XML and HTML character entity references - Wikipedia

    en.wikipedia.org/wiki/List_of_XML_and_HTML...

    In SGML, HTML and XML documents, the logical constructs known as character data and attribute values consist of sequences of characters, in which each character can manifest directly (representing itself), or can be represented by a series of characters called a character reference, of which there are two types: a numeric character reference and a character entity reference.

  4. Ampersand - Wikipedia

    en.wikipedia.org/wiki/Ampersand

    In SGML, XML, and HTML, the ampersand is used to introduce an SGML entity, such as   (for non-breaking space) or α (for the Greek letter α). The HTML and XML encoding for the ampersand character is the entity &. This can create a problem known as delimiter collision when converting text into one of these markup languages.

  5. Power amplifier classes - Wikipedia

    en.wikipedia.org/wiki/Power_amplifier_classes

    Power amplifier classes. In electronics, power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier 's characteristics and performance. The first three classes are related to the time period that the active amplifier device is passing current, expressed as a fraction ...

  6. Fender Blues Junior - Wikipedia

    en.wikipedia.org/wiki/Fender_Blues_Junior

    The Blues Junior is a tube guitar amplifier introduced in 1995 by the Fender Musical Instrument Corporation. It is aimed at achieving the warm, tube-driven tone common in many styles of American blues and blues rock dating back to the 1950s, while remaining both portable and affordable. A popular amp, Fender have released numerous versions ...

  7. Reference designator - Wikipedia

    en.wikipedia.org/wiki/Reference_designator

    A reference designator unambiguously identifies the location of a component within an electrical schematic or on a printed circuit board. The reference designator usually consists of one or two letters followed by a number, e.g. C3, D1, R4, U15. The number is sometimes followed by a letter, indicating that components are grouped or matched with ...

  8. HTML - Wikipedia

    en.wikipedia.org/wiki/HTML

    Initially code-named "Cougar", HTML 4.0 adopted many browser-specific element types and attributes, but also sought to phase out Netscape's visual markup features by marking them as deprecated in favor of style sheets. HTML 4 is an SGML application conforming to ISO 8879 – SGML. April 24, 1998

  9. Pulse-width modulation - Wikipedia

    en.wikipedia.org/wiki/Pulse-width_modulation

    Class-D amplifiers produce a PWM equivalent of a lower frequency input signal that can be sent to a loudspeaker via a suitable filter network to block the carrier and recover the original lower frequency signal. Since they switch power directly from the high supply rail and low supply rail, these amplifiers have efficiency above 90% and can be ...