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13 relations: Big O notation, Binary search algorithm, Computer science, Data structure, Direct-access storage device, Hard disk drive, Linked list, Magnetic tape data storage, Merge sort, Queued Sequential Access Method, Quicksort, Random access, Sequence.
Big O notation
Big O notation is a mathematical notation that describes the limiting behaviour of a function when the argument tends towards a particular value or infinity.
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Binary search algorithm
In computer science, binary search, also known as half-interval search,logarithmic search, or binary chop, is a search algorithm that finds the position of a target value within a sorted array.
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Computer science
Computer science deals with the theoretical foundations of information and computation, together with practical techniques for the implementation and application of these foundations.
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Data structure
In computer science, a data structure is a data organization and storage format that enables efficient access and modification.
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Direct-access storage device
A direct-access storage device (DASD) pronounced) is a secondary storage device in which "each physical record has a discrete location and a unique address." IBM coined the term DASD as a shorthand describing disks, magnetic drums, and data cells. Later, optical disc drives are also classified as DASD. The term DASD contrasts with sequential storage media such as magnetic tape, and unit record equipment such as card devices like card readers and punches. Access methods for DASD include sequential, indexed, and direct. Direct access contrasts with the sequential access method used in tape drives. A record on a DASD can be accessed without having to read through intervening records from the current location, whereas reading anything other than the "next" record on tape requires skipping over intervening records, and requires a proportionally long time to access a distant point in a medium. The DASD storage class includes both fixed and removable media.
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Hard disk drive
A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.
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Linked list
In computer science, a linked list is a linear collection of data elements, whose order is not given by their physical placement in memory.
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Magnetic tape data storage
Magnetic tape data storage is a system for storing digital information on magnetic tape using digital recording.
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Merge sort
In computer science, merge sort (also commonly spelled mergesort) is an efficient, general-purpose, comparison-based sorting algorithm.
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Queued Sequential Access Method
In IBM mainframe operating systems, queued sequential access method (QSAM) is an access method to read and write datasets sequentially.
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Quicksort
Quicksort (sometimes called partition-exchange sort) is an efficient sorting algorithm, serving as a systematic method for placing the elements of an array in order.
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Random access
In computer science, random access (more precisely and more generally called direct access) is the ability to access any item of data from a population of addressable elements roughly as easily and efficiently as any other, no matter how many elements may be in the set.
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Sequence
In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed.
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Sequential I/O, Sequential access method, Sequential read, Sequential write, Serial access.
