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History Of Software Engineering
The history of software engineering begins in the 1960s. Writing software has evolved into a profession concerned with how best to maximize the quality of software and of how to create it. Quality can refer to how maintainable software is, to its stability, speed, usability, testability, readability, size, cost, security, and number of flaws or "bugs", as well as to less measurable qualities like elegance, conciseness, and customer satisfaction, among many other attributes. How best to create high quality software is a separate and controversial problem covering software design principles, so-called "best practices" for writing code, as well as broader management issues such as optimal team size, process, how best to deliver software on time and as quickly as possible, work-place "culture", hiring practices, and so forth. All this falls under the broad rubric of software engineering. Overview The evolution of software engineering is notable in a number of areas: * Emergence as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Engineering
Software engineering is a systematic engineering approach to software development. A software engineer is a person who applies the principles of software engineering to design, develop, maintain, test, and evaluate computer software. The term '' programmer'' is sometimes used as a synonym, but may also lack connotations of engineering education or skills. Engineering techniques are used to inform the software development process which involves the definition, implementation, assessment, measurement, management, change, and improvement of the software life cycle process itself. It heavily uses software configuration management which is about systematically controlling changes to the configuration, and maintaining the integrity and traceability of the configuration and code throughout the system life cycle. Modern processes use software versioning. History Beginning in the 1960s, software engineering was seen as its own type of engineering. Additionally, the development of so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apollo Guidance Computer
The Apollo Guidance Computer (AGC) was a digital computer produced for the Apollo program that was installed on board each Apollo command module (CM) and Apollo Lunar Module (LM). The AGC provided computation and electronic interfaces for guidance, navigation, and control of the spacecraft. The AGC was the first computer based on silicon integrated circuits. The computer's performance was comparable to the first generation of home computers from the late 1970s, such as the Apple II, TRS-80, and Commodore PET. The AGC has a 16-bit Word (computer architecture), word length, with 15 data bits and one parity bit. Most of the software on the AGC is stored in a special read-only memory known as core rope memory, fashioned by weaving wires through and around magnetic cores, though a small amount of read/write core memory is available. Astronauts communicated with the AGC using a numeric display and keyboard called the DSKY (for "display and keyboard", pronounced "DIS-kee"). The AGC and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OS/360
OS/360, officially known as IBM System/360 Operating System, is a discontinued batch processing operating system developed by IBM for their then-new System/360 mainframe computer, announced in 1964; it was influenced by the earlier IBSYS/IBJOB and Input/Output Control System (IOCS) packages for the IBM 7090/7094 and even more so by the PR155 Operating System for the IBM 1410/ 7010 processors. It was one of the earliestJust a few years after Atlas Supervisor, Burroughs MCP and GECOS operating systems to require the computer hardware to include at least one direct access storage device. Although OS/360 itself was discontinued, successor operating systems, including the virtual storage MVS and the 64-bit z/OS, are still run and maintain application-level compatibility with OS/360. Overview IBM announced three different levels of OS/360, generated from the same tapes and sharing most of their code. IBM eventually renamed these options and made some significant design changes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Budget Overrun
A cost overrun, also known as a cost increase or budget overrun, involves unexpected incurred costs. When these costs are in excess of budgeted amounts due to a value engineering underestimation of the actual cost during budgeting, they are known by these terms. Cost overruns are common in infrastructure, building, and technology projects. For IT projects, a 2004 industry study by the Standish Group found an average cost overrun of 43 percent; 71 percent of projects came in over budget, exceeded time estimates, and had estimated too narrow a scope; and total waste was estimated at $55 billion per year in the US alone. Many major construction projects have incurred cost overruns; cost estimates used to decide whether important transportation infrastructure should be built can mislead grossly and systematically. Cost overrun is distinguished from cost escalation, which is an ''anticipated'' growth in a budgeted cost due to factors such as inflation. Causes Recent works by Ahia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Quality Assurance
Software quality assurance (SQA) is a means and practice of monitoring all software engineering processes, methods, and work products to ensure compliance against defined standards. It may include ensuring conformance to standards or models, such as ISO/IEC 9126 (now superseded by ISO 25010), SPICE or CMMI. It includes standards and procedures that managers, administrators or developers may use to review and audit software products and activities to verify that the software meets quality criteria which link to standards. SQA encompasses the entire software development process, including requirements engineering, software design, coding, code reviews, source code control, software configuration management, testing, release management and software integration. It is organized into goals, commitments, abilities, activities, measurements, verification and validation. Purpose SQA involves a three-pronged approach: * Organization-wide policies, procedures and standards * P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Productivity
Productivity is the efficiency of production of goods or services expressed by some measure. Measurements of productivity are often expressed as a ratio of an aggregate output to a single input or an aggregate input used in a production process, i.e. output per unit of input, typically over a specific period of time. The most common example is the (aggregate) labour productivity measure, one example of which is GDP per worker. There are many different definitions of productivity (including those that are not defined as ratios of output to input) and the choice among them depends on the purpose of the productivity measurement and/or data availability. The key source of difference between various productivity measures is also usually related (directly or indirectly) to how the outputs and the inputs are aggregated to obtain such a ratio-type measure of productivity. Productivity is a crucial factor in the production performance of firms and nations. Increasing national producti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Therac-25
The Therac-25 was a computer-controlled radiation therapy machine produced by Atomic Energy of Canada Limited (AECL) in 1982 after the Therac-6 and Therac-20 units (the earlier units had been produced in partnership with of France). It was involved in at least six accidents between 1985 and 1987, in which patients were given massive overdoses of radiation. Because of concurrent programming errors (also known as race conditions), it sometimes gave its patients radiation doses that were hundreds of times greater than normal, resulting in death or serious injury. These accidents highlighted the dangers of software control of safety-critical systems, and they have become a standard case study in health informatics, software engineering, and computer ethics. Additionally, the overconfidence of the engineers and lack of proper due diligence to resolve reported software bugs are highlighted as an extreme case where the engineers' overconfidence in their initial work and failure t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Software Crisis
Software crisis is a term used in the early days of computing science for the difficulty of writing useful and efficient computer programs in the required time. The software crisis was due to the rapid increases in computer power and the complexity of the problems that could not be tackled. With the increase in the complexity of the software, many software problems arose because existing methods were inadequate. The term "software crisis" was coined by some attendees at the first NATO Software Engineering Conference in 1968 at Garmisch, Germany. Edsger Dijkstra's 1972 Turing Award Lecture makes reference to this same problem: The causes of the software crisis were linked to the overall complexity of hardware and the software development process. The crisis manifested itself in several ways: * Projects running over-budget * Projects running over-time * Software was very inefficient * Software was of low quality * Software often did not meet requirements * Projects were unmanagea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saylor Foundation
The Saylor Academy, formerly known as the Saylor Foundation, is a non-profit organization headquartered in Washington, DC. It was established in 1999 by its sole trustee, Michael J. Saylor. Since 2008, the focus of the foundation has been its Free Education Initiative which has led to the creation of 241 courses representing 10 of the highest enrollment majors in the US. The Saylor Academy assembles courses from openly available texts and resources. The foundation also funds the creation of new materials when needed, which is then openly licensed for use by other organizations and individuals. In March 2018 Edovo partnered with Saylor Academy. Courses On its website, the foundation offers 317 free, college-level courses, which are selected as typical courses in high enrollment majors at traditional U.S. colleges. Content is accessible without needing to register or log into the website, however an account is required to gain access to final exams, and a free certificate of co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Report Of A Conference Sponsored By The NATO Science Committee
A report is a document that presents information in an organized format for a specific audience and purpose. Although summaries of reports may be delivered orally, complete reports are almost always in the form of written documents. Usage In modern business scenario, reports play a major role in the progress of business. Reports are the backbone to the thinking process of the establishment and they are responsible, to a great extent, in evolving an efficient or inefficient work environment. The significance of the reports includes: * Reports present adequate information on various aspects of the business. * All the skills and the knowledge of the professionals are communicated through reports. * Reports help the top line in decision making. * A rule and balanced report also helps in problem solving. * Reports communicate the planning, policies and other matters regarding an organization to the masses. News reports play the role of ombudsman and levy checks and balances on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garmisch
Garmisch-Partenkirchen (; Bavarian: ''Garmasch-Partakurch''), nicknamed Ga-Pa, is an Alpine ski town in Bavaria, southern Germany. It is the seat of government of the district of Garmisch-Partenkirchen (abbreviated ''GAP''), in the Oberbayern region, which borders Austria. Nearby is Germany's highest mountain, Zugspitze, at above sea level. The town is known as the site of the 1936 Winter Olympic Games, the first to include alpine skiing, and hosts a variety of winter sports competitions. History Garmisch (in the west) and Partenkirchen (in the east) were separate towns for many centuries, and still maintain quite separate identities. Partenkirchen originated as the Roman town of ''Partanum'' on the trade route from Venice to Augsburg and is first mentioned in the year A.D. 15. Its main street, Ludwigsstrasse, follows the original Roman road. Garmisch was first mentioned some 800 years later as ''Germaneskau'' ("German District"), suggesting that at some poin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NATO Science For Peace And Security
The NATO Science for Peace and Security (SPS) Programme is a NATO programme supporting civil science cooperation and innovation. Created in 2006 as the merger of the NATO Science Committee (SCOM) and the Committee on the Challenges of Modern Society (CCMS), the SPS offers grants to scientists in NATO and NATO Partner countries for work on civil science projects. Partner countries are located in Eastern Europe and the former Soviet Union. Grants are also available to scientists in seven countries known as the Mediterranean Dialogue: Algeria, Egypt, Israel, Jordan, Mauritania, Morocco, and Tunisia. Each SPS project is conducted in a specific NATO priority area by a collaboration between working scientists in eligible Partner countries and scientists in NATO Allied countries. Applications must be in the area of the SPS Key Priorities. Representative SPS projects * Improvement of Egypt's water supply. * South Caucasus River Monitoring—assess pollutants and radionuclides in the Kura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
