Software engineer A software engineer programming for the Wikimedia Foundation Software engineers apply the principles of engineering to the design, development, maintenance, testing, and evaluation of the software and systems that make computers or anything containing software work. Typical formal definitions of software engineering are: "the application of a systematic, disciplined, quantifiable approach to the development, operation, and maintenance of software".[1]"an engineering discipline that is concerned with all aspects of software production"[2]"the establishment and use of sound engineering principles in order to economically obtain software that is reliable and works efficiently on real machines"[3] The term has been used less formally: Overview[edit] Prior to the mid-1960s, software practitioners called themselves computer programmers or software developers, regardless of their actual jobs. These terms cause confusion, because some[who?] A state of the art[edit] In 2004, Keith Chapple of the U.
Servicio web Estándares empleados[editar] Ventajas de los servicios web[editar] Aportan interoperabilidad entre aplicaciones de software independientemente de sus propiedades o de las plataformas sobre las que se instalen.Los servicios Web fomentan los estándares y protocolos basados en texto, que hacen más fácil acceder a su contenido y entender su funcionamiento.Permiten que servicios y software de diferentes compañías ubicadas en diferentes lugares geográficos puedan ser combinados fácilmente para proveer servicios integrados. Inconvenientes de los servicios Web[editar] Para realizar transacciones no pueden compararse en su grado de desarrollo con los estándares abiertos de computación distribuida como CORBA (Common Object Request Broker Architecture).Su rendimiento es bajo si se compara con otros modelos de computación distribuida, tales como RMI (Remote Method Invocation), CORBA o DCOM (Distributed Component Object Model). Razones para crear servicios Web[editar] Plataformas[editar]
Learning Perl the Hard Way by Allen B. Downey. Download this book in PDF. Read other books from Green Tea Press. Do we really need another Perl book? I want a book for people who already know how to program in another language, but don't know Perl. This book is a work in progress. Learning Perl the Hard Way is a free book available under the GNU Free Documentation License. Printable versions of the book are available in PDF and gzipped Postscript. Peer-to-peer A peer-to-peer (P2P) network in which interconnected nodes ("peers") share resources amongst each other without the use of a centralized administrative system Peer-to-peer (P2P) computing or networking is a distributed application architecture that partitions tasks or work loads between peers. Peers are equally privileged, equipotent participants in the application. They are said to form a peer-to-peer network of nodes. Peers make a portion of their resources, such as processing power, disk storage or network bandwidth, directly available to other network participants, without the need for central coordination by servers or stable hosts.[1] Peers are both suppliers and consumers of resources, in contrast to the traditional client-server model in which the consumption and supply of resources is divided. Historical development[edit] Therefore, a distributed messaging system that is often likened as an early peer-to-peer architecture was established: USENET. Applications[edit]
Software architect Software architect is a computer manager who makes high-level design choices and dictates technical standards, including software coding standards, tools, and platforms. History[edit] With the popularity of multi-tier application development, the choices of how an application can be built have also increased. Given that expansion, the risk that a software development project may inadvertently create a "new" end product that, in essence, already existed has grown markedly. A new 'software architect' role has become necessary during software development.[citation needed] The software architect concept began to take hold when object-oriented programming (OOP) was coming into more widespread use (in the late 1990s and early years of the 21st century). Responsibilities[edit] The main responsibilities of a software architect include: Limit choices available during development by Recognize potential reuse in the organization or in the application by Duties[edit] See also[edit] References[edit]
CORBA Common Object Request Broker Architecture (CORBA) es un estándar definido por Object Management Group (OMG) que permite que diversos componentes de software escritos en múltiples lenguajes de programación y que corren en diferentes computadoras, puedan trabajar juntos; es decir, facilita el desarrollo de aplicaciones distribuidas en entornos heterogéneos. Introducción[editar] CORBA fue el primer producto propuesto por OMG. Su objetivo es ayudar a reducir la complejidad, disminuir los costes y acelerar la introducción de nuevas aplicaciones informáticas, promoviendo la teoría y la práctica de la tecnología de objetos en los sistemas distribuidos. Es una tecnología que oculta la programación a bajo nivel de aplicaciones distribuidas. CORBA es más que una especificación multiplataforma, también define servicios habitualmente necesarios como seguridad y transacciones. Historia[editar] Su primera versión se lanzó en 1991. Características[editar] Elementos[editar] Objetos por referencia[editar]
Programmer British countess and mathematician Ada Lovelace is considered the first computer programmer, as she was the first to write and publish an algorithm intended for implementation on Charles Babbage's analytical engine, in October 1842, intended for the calculation of Bernoulli numbers.[8] Lovelace was also the first person to comment on the potential for computers to be used for purposes other than computing calculations. Because Babbage's machine was never completed to a functioning standard in her time, she never saw her algorithm run. The first person to run a program on a functioning modern electronically based computer was computer scientist Konrad Zuse, in 1941. The ENIAC programming team, consisting of Kay McNulty, Betty Jennings, Betty Snyder, Marlyn Wescoff, Fran Bilas and Ruth Lichterman were the first regularly working programmers.[9][10] Nature of the work[edit] Programmers in the Yandex headquarters. Testing and debugging[edit] Application versus system programming[edit]
Space-based architecture The SBA model is closely related to other patterns that have been proved successful in addressing the application scalability challenge, such as shared nothing architecture (SN), used by Google, Amazon.com and other well-known companies. The model has also been applied by many firms in the securities industry for implementing scalable electronic securities trading applications. Components of Space-Based Architecture[edit] An application built on the principles of space-based architecture typically has the following components: Processing Unit — the unit of scalability and fail-over. See also[edit] Literature[edit] Articles/papers, technical: References[edit]
Software developer A software developer is a person concerned with facets of the software development process. Their work includes researching, designing, implementing, and testing software.[1] A software developer may take part in design, computer programming, or software project management. They may contribute to the overview of the project on the application level rather than component-level or individual programming tasks. Software developers are often still guided by lead programmers but the description also encompasses freelance software developers. Description[edit] In the US, a software developer is classified into one of 3 titles (all under the 15-0000 Computer and Mathematical Occupations Major Group):[2] 15-1131 Computer Programmers[3]15-1132 Software Developers, Applications[4]15-1133 Software Developers, Systems Software[5] Aspects of developer's job may include: In a large company, there may be employees whose sole responsibility may consist of only one of the phases above. References[edit]