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  2. Telephone number pooling - Wikipedia

    en.wikipedia.org/wiki/Telephone_number_pooling

    Public resistance to the introduction of new area codes, whether as overlay complexes (which allowed customers to keep their existing numbers, but broke seven-digit local calling) or by area code splits (where the area code of existing numbers was changed), prompted the FCC and state commissions to introduce thousands-block number pooling, i.e. the allocation of number space in blocks of only ...

  3. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    Traditionally, central office switching systems were designed to serve as many as ten thousand subscriber numbers. Thus, subscribers were assigned four-digit line or station numbers. This rounded the total number of digits in a subscriber telephone number to ten: a three-digit area code, a three-digit central office code, and four digits for ...

  4. Base ten blocks - Wikipedia

    en.wikipedia.org/wiki/Base_ten_blocks

    Wooden Dienes blocks in units of 1, 10, 100 and 1000 Plastic Dienes blocks in use. Base ten blocks, also known as Dienes blocks after popularizer Zoltán Dienes (Hungarian: [ˈdijɛnɛʃ]), are a mathematical manipulative used by students to practice counting and elementary arithmetic and develop number sense in the context of the decimal place-value system as a more concrete and direct ...

  5. Numberblocks - Wikipedia

    en.wikipedia.org/wiki/Numberblocks

    Numberblocks follows the adventures of sentient, colourful block characters in Numberland, each representing and named after a number, and made up of the equivalent number of blocks. A black floating number, called a Numberling, appears above their heads to show their value. When one block hops on top of another, they combine into a different ...

  6. Blocked 10 - AOL

    www.aol.com/games/play/masque-publishing/blocked-10

    Blocked 10. Choose puzzle pieces and place them into the block grid. As you complete a row or column, that line of blocks disappears and awards points.

  7. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The [main] field of the drawing, as opposed to other areas of it, such as the parts list , general notes (G/N), flagnotes , title block , rev block , bill of materials (B/M or BoM or BOM), or list of materials . Rationales for drawing changes that are noted in the rev block often use these abbreviations for brevity (e.g., "DIM 14.00 was 12.50 ...

  8. Thousands rally in downtown Los Angeles, shut down 101 ... - AOL

    www.aol.com/news/thousands-protesters-rally...

    Videos posted on social media after 10 p.m. showed police calling for protesters to disperse. Protesters rally on the Alameda overpass of the 101 Freeway against President Trump's deportation ...

  9. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    Every engineering drawing must have a title block. [13] [14] [15] The title block (T/B, TB) is an area of the drawing that conveys header-type information about the drawing, such as: Drawing title (hence the name "title block") Drawing number; Part number(s) Name of the design activity (corporation, government agency, etc.)