# operation

(redirected from open operation)
Also found in: Dictionary, Thesaurus, Medical.

## operation

1. Surgery any manipulation of the body or one of its organs or parts to repair damage, arrest the progress of a disease, remove foreign matter, etc.
2. Maths
a. any procedure, such as addition, multiplication, involution, or differentiation, in which one or more numbers or quantities are operated upon according to specific rules
b. a function from a set onto itself
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

## Operation

the process of finding a particular quantity (data element) as the result of performance by a digital computer of special actions ordered by a program instruction on one or more initial quantities. The quantities that are the object of the operation are called operands. A distinction is made among data-processing, or computational, operations; control operations; and operations on program instructions (address-substitution operations).

The following computational operations may be distinguished: arithmetical, logic bit-by-bit, and logic operations. Arithmetical operations (addition, subtraction, multiplication, and division) are those that are performed according to the rules of arithmetic; the operands and the results of arithmetical operations are usually numbers in various forms of representation (with fixed or floating decimal point; fields of variable length) and various systems of notation, such as binary, ternary, or decimal. Logic bit-by-bit operations—logical addition, multiplication, biconditional implication and nonimplication (that is, comparison)—are performed according to the rules of algebraic logic; the operands and results of such operations are individual bits of the initial quantities represented in binary form. Logic operations, such as search, access, sorting, and grouping, are performed on certain bits of the operands or sets of bits (digits, letters, symbols, or bytes). Control operations ensure performance of the program and operation of the computer devices. They include control transfer, cycle organization, access to peripherals, routing of data, interruption of the master program, and changes of the mode of operation of the devices (start, stop, search a zone, read, write, and so on). In address-substitution operations (instruction modification), the operands are the actual instructions of the program. These operations play a large part in the writing of looped programs and in the provision for simultaneous operation on several programs.

Computers can perform various operations by hardware and hardware-software methods. In the second method the elementary operations (micro-operations) that make up more complex operations (macro-operations) are performed by hardware in a sequence determined by the program of the particular macro-operation. The higher the performance of the computer, the greater the assortment of operations that can be performed by hardware. The range of operations of a specialized digital computer is determined by the specific features of the class of problems it solves; for a general-purpose computer the set of operations is chosen by calculating the convenience of solving various classes of problems.

G. B. SMIRNOV

## Operation

the totality of strikes, encounters, and battles, coordinated and interrelated by objective, time, and place and conducted by operational commands of one or more armed services according to a single concept and plan for fulfilling operational or strategic missions.

The operation as a form of waging military actions first appeared in the wars of the late 18th century and early 19th; the concept of the “operation” took shape practically and theoretically in the early 20th century. By the mid-1930’s the theory of waging a deep offensive operation with massive use of tanks, aviation, artillery, and airborne landings had been worked out in the Soviet armed forces. Present-day operations may include land, naval, air, and airborne operations.

In terms of objectives, operations may be offensive or defensive, whereas in terms of time, they are either simultaneous or successive (one develops another). Depending on the composition of forces involved, operations are classified as strategic, front (groups of armies), fleet, army, or flotilla operations. The objectives and content of an operation are determined by the military and political objectives of the combatants in the theater of war, the composition of participating forces, the concrete conditions of the operational-strategic situation, the nature of the actions of enemy and friendly forces, and terrain conditions. The most typical indexes of the scope of an offensive operation are its depth, duration, width of zone of attack, and rate of advance of forces. For the defensive operation, the indexes are the width of the zone, the depth of construction of the defense, and the duration of the defensive operation. The preparation for and conduct of operations are the subject of strategy and operational art.

P. K. ALTUKHOV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

## What does it mean when you dream about an operation?

A medical procedure being performed on the dreamer may signify old issues being “cut out” or patched up. If the dreamer is doing the operating, then deep unconscious issues are being faced, worked on, and healed. The overall implication of this dream depends on one’s experiences with medical operations.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.

## operation

[‚äp·ə′rā·shən]
(computer science)
A process or procedure that obtains a unique result from any permissible combination of operands.
The sequence of actions resulting from the execution of one digital computer instruction.
(industrial engineering)
A job, usually performed in one location, and consisting of one or more work elements.
(mathematics)
An operation of a group G on a set S is a mapping which associates to each ordered pair (g, s), where g is in G and s is in S, another element in S, denoted gs, such that, for any g, h in G and s in S, (gh) s = g (hs), and es = s, where e is the identity element of G.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## operation

(1) See operation code.

(2) Any manual or machine activity. See process.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Despite the large number of publications on the subject, the majority of papers lack no scientific comparisons with the open operations, but make presumptive claims of the benefits of the laparoscopic approach.
Then we have A [subset or equal to] [cl.sub.[gamma]]([int[gamma]](A)) and since [gamma] is an open operation, so [cl.sub.[gamma]](A) [subset or equal to] [int.sub.[gamma]]([cl.sub.[gamma]] (A))[19].
* Open operations are easily taught and most surgeons are au fait with the techniques.
"We have offered to do covert and open operations, and offered specialist advice, particularly concerning hotel room doors, which are a weak point."
A Teesside company is set to open operations in India.
The Bowes Incline is holding an Open Operations Day from 10am to 4pm on Sunday
A single surgeon performed all laparoscopic operations; another performed all open operations.
Myers also said that the US would open operations in northern Iraq with or without the co-operation of Turkey.
The UK office will expand "within the next several months" as will the New York headquarters, and Beanstalk plans to open operations (whether via internal expansion or acquisition) in Latin America and the Far East, as well as in emerging markets such as India.
Enquiries from companies looking to open operations in Staffordshire remained steady over the past six months, a report by agency InStaffs said.
They incorporate open operations, laparoscopic procedures, and new robotic approaches.
China-based Industrial and Commercial Bank of China (ICBC) has received approval to open operations in Kuwait.

Site: Follow: Share:
Open / Close