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  2. Ladder - Wikipedia

    en.wikipedia.org/wiki/Ladder

    Ladder. A ladder is a vertical or inclined set of rungs or steps commonly used for climbing or descending. There are two types: rigid ladders that are self-supporting or that may be leaned against a vertical surface such as a wall, and rollable ladders, such as those made of rope or aluminium, that may be hung from the top.

  3. Snakes and ladders - Wikipedia

    en.wikipedia.org/wiki/Snakes_and_ladders

    Snakes and ladders is a board game for two or more players regarded today as a worldwide classic. [ 1] The game originated in ancient India as Moksha Patam, and was brought to the United Kingdom in the 1890s. It is played on a game board with numbered, gridded squares. A number of "ladders" and "snakes" are pictured on the board, each ...

  4. Fixed ladder - Wikipedia

    en.wikipedia.org/wiki/Fixed_ladder

    Fixed ladder. A fixed ladder is a vertical ladder mounted permanently to a structure. These ladders are primarily used to access roofs or other structures for industrial purposes. In the United States, these ladders are covered by OSHA and ANSI standards.

  5. Ladderback chair - Wikipedia

    en.wikipedia.org/wiki/Ladderback_chair

    Ladderback chairs tend to have tall backs with two uprights. Between these two uprights exists multiple horizontal spindles or slats (three in the picture to the right). The seat can be made of a variety of different materials. Originally the majority of seats were constructed using cane or rush, whereas now, the seats tend to be made of wood.

  6. Ladder logic - Wikipedia

    en.wikipedia.org/wiki/Ladder_logic

    Ladder notation is best suited to control problems where only binary variables are required and where interlocking and sequencing of binary is the primary control problem. Like all parallel programming languages , the sequential order of operations may be undefined or obscure; logic race conditions are possible which may produce unexpected results.

  7. Cosmic distance ladder - Wikipedia

    en.wikipedia.org/wiki/Cosmic_distance_ladder

    The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth.

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