write head
81Floptical — refers to a type of disk drive that combines magnetic and optical technologies to store large amounts of data on media similar to 3½ inch floppy disks. The name is a portmanteau of the words floppy and optical . It refers specifically to one… …
82Bendix G-15 — The Bendix G 15 computer was introduced in 1956 by the Bendix Corporation, Computer Division, Los Angeles, California. It was about 5 by 3 by 3 ft (1.5m by 1m by 1m) and weighed about 950 lb (450 kg). The base system, without peripherals, cost… …
83Counter machine — A counter machine is an abstract machine used in formal logic and theoretical computer science to model computation. It is the most primitive of the four types of register machines. A counter machine comprises a set of one or more unbounded… …
84information processing — Acquisition, recording, organization, retrieval, display, and dissemination of information. Today the term usually refers to computer based operations. Information processing consists of locating and capturing information, using software to… …
85Electric motor — For other kinds of motors, see motor (disambiguation). For a railroad electric engine, see electric locomotive. Various electric motors. A 9 volt PP3 transistor battery is in the center foreground for size comparison. An electric motor converts… …
86nanotechnology — /nan euh tek nol euh jee, nay neuh /, n. any technology on the scale of nanometers. [1987] * * * Manipulation of atoms, molecules, and materials to form structures on the scale of nanometres (billionths of a metre). These nanostructures typically …
87Solid-state drive — A solid state drive (SSD) is a data storage device that uses solid state memory to store persistent data. Unlike flash based memory cards and USB flash drives, an SSD emulates a hard disk drive interface, thus easily replacing it in most… …
88DVD — This article is about the storage media format. For the binocular vision condition, see Dissociated vertical deviation. DVD DVD R read/write side Media type Optical disc …
89Seek time — is one of the three delays associated with reading or writing data on a computer s disk drive, and somewhat similar for CD or DVD drives. The others are rotational delay and transfer time, and their sum is access time. In order to read or write… …
90Computation history — In computer science, a computation history is a sequence of steps taken by an abstract machine in the process of computing its result. Computation histories are frequently used in proofs about the capabilities of certain machines, and… …
