What Are the Issues Surrounding Computer Privacy?

Generally composed of computer hardware system, system software, application software. The basic hardware system of the computer is composed of an arithmetic unit and a controller, a memory, a peripheral interface and a peripheral device. System software includes operating systems, compilers, database management systems, and various high-level languages. Application software consists of general support software and various application software packages

Book title: Computer application system
Original name: computer application systems

Make up: Hardware system system software application software
Direction: Theoretical methods and systems in various fields

Introduction to Computer Application System

computer application systems

Computer Application System Research

Studying theories, methods, technologies, and systems of computers applied in various fields is a marginal subject that combines computer science with other disciplines and is a component of computer science. Computer applications are divided into two areas of numerical computing and non-numerical applications. Non-numerical applications include data processing and knowledge processing, such as information systems, factory automation, office automation, home automation, expert systems, pattern recognition, machine translation and other fields. ^[1]

Computer application system analysis and design

Computer application system analysis and design is a subject that computer application research generally needs to solve. Application system analysis consists in systematically investigating and analyzing the characteristics and requirements of the application environment, establishing mathematical models, describing them in a certain standardized form, and forming the technical design requirements for computer application systems. Application system design includes system configuration design, system performance evaluation, application software overall design, and other engineering design, and is finally provided to users in the form of system products. ^[1]

Computer application system applications

Computer applications have penetrated into the broad fields of science, technology, and society. According to the form of information processing of their application problems, they can be roughly divided into: scientific computing. Find numerical solutions to various mathematical problems. Data processing. Data are collected and recorded with a computer, and processed to generate new information forms. It mainly includes data collection, conversion, grouping, organization, calculation, sorting, storage, and retrieval. Knowledge processing. Use computers to represent, use, and acquire knowledge. The application of computers has penetrated into almost every field of society. The following are some important aspects: Computer-aided design, manufacturing, and testing (CAD / CAM / CAT). Computer-aided engineering design, product manufacturing, and performance testing. Office automation: use computers to process various businesses and commerce; process data report files; perform statistics, analysis and auxiliary decision-making for various office operations. Economic management: national economic management, corporate economic information management, planning and planning, analysis and statistics, forecasting, decision-making; management of materials, finance, labor and personnel. Information retrieval: information retrieval automation of books, historical archives, scientific and technological resources, and the environment; establishment of various information systems. Automatic control: comprehensive automation of industrial production process, optimal control of process, weapon control, communication control, traffic signal control. Pattern recognition: use a computer to identify and classify a group of events or processes. They can be specific objects such as text, sound, and images, or abstract objects such as states and degrees. Affairs management: For public institutions, it mainly deals with daily affairs, such as hospital management information system, restaurant management information system, and school management information system. ^[1]

Computer application system system development

According to the user's technical requirements for the application system, analyze the manually processed information flow, design the internal structure of the computer system, and implement and maintain it. The development of computer application systems is the secondary development of computer technology. The development process, ie the system life cycle, is generally divided into 5 stages, namely planning, analysis, design, implementation, operation and maintenance. ^[1]

Planning stage. The task at this stage is to conduct a preliminary investigation of the application environment, goals, and the status of the current system, identify problems, determine the development strategy of the system, analyze and forecast the demand for the construction system, and analyze the various types of new system construction. Constraints, studying the necessity and possibility of building a new system. Write a feasibility analysis report, submit it to the user for approval, and compile the system proposal and implementation plan into a system development task book and enter the system analysis stage. ^[1]

Analysis stage. According to the needs of computer users for input, processing, and output characteristics, the current status of the original system is investigated and analyzed, and based on this, preliminary suggestions for establishing a new system or transforming an old system are proposed, that is, the goals, functions, Make predictions and descriptions of costs, benefits, personnel, and progress. This phase is also called the feasibility study phase. ^[1]

Design stage. First, determine the system composition and the requirements of the software and hardware environment based on the survey, and propose a system proposal. After the scheme is demonstrated and approved, it is transferred to the physical design, that is, the system's input and output, processing process, information flow, data structure, display and print format, and man-machine dialogue mode are detailed and layered. At this time, the system should be divided into several modules and processes, and their correlation and processing order should be analyzed to ensure the integrity, correctness and adaptability of the system. After careful analysis and choice of various methods, at the end of this phase, an implementation plan and schedule are proposed, and the system user manual and operation manual are written. The analysis and design work is done by the system analyst. ^[1]

Realization stage. Implement the application system according to the system design plan, and complete the machine configuration and installation, system debugging and conversion, programming, personnel training, data preparation and initialization. The work at this stage is done by programmers and operators. ^[1]

Operation and maintenance stage. After the successful development of the system, it is the period when the users are formally used and brought into play. Including the daily operation management and maintenance of the system, the comprehensive evaluation of the system and the supervision and audit of the system development project. Maintenance work generally includes four aspects: correctness, completeness, adaptability and preventiveness. During system operation, system functions may be insufficient due to changes in the environment, or functional requirements that were not found or cannot be resolved during the development process, and the system needs to be modified, maintained, or partially adjusted. This is done by giving users notice of changes or updating versions. ^[1]

Computer Application System Evaluation

System evaluation has a direct guiding significance for the development of computer application systems. It requires qualitative or quantitative analysis of functional indicators, performance indicators, availability, reliability, understandability, scalability, maintainability, portability, and system cost. . The quality of these indicators determines the length of the system life. ^[1]

Computer application system system features

By having computing distributed across a large number of distributed computers rather than local computers or remote servers, an enterprise data center will operate more like the Internet. This enables companies to switch resources to the applications they need and access computers and storage systems as needed. ^[1]

It is like shifting from the old single generator mode to the centralized power supply mode of the power plant. It means that computing power can also be circulated as a commodity, just like gas, water and electricity, easy to access and low in cost. The biggest difference is that it is transmitted over the Internet. ^[1]

Analysis of Computer Application System

Computer application system computing is often confused with grid computing, utility computing, and autonomous computing. ^[1]

Grid computing: A type of distributed computing, a super virtual computer composed of a group of loosely coupled computers, commonly used to perform some large tasks; ^[1]

Utility calculation: a way to package and charge IT resources, such as measuring expenses separately according to calculation and storage, like traditional public facilities such as electricity; ^[1]

Autonomous computing: A computer system with self-management functions. ^[1]

In fact, many cloud computing deployments rely on computer clusters (but very different from the composition, architecture, purpose, and working methods of the grid), and also absorb the characteristics of autonomous computing and utility computing. ^[1]

Computer application system privacy issues

Computer application system technology requires a large number of users to participate, and privacy issues inevitably arise. User participation involves collecting certain user data, which raises concerns about user data security. Many users worry that their privacy will be collected by cloud technology. Because of this, when joining the cloud plan, many vendors promised to avoid collecting user privacy as much as possible, and even if it is collected, it will not be leaked or used. But many people still doubt the manufacturers' promises, and their doubts are not unreasonable. Many well-known vendors have been accused of leaking user privacy, and leaks do happen from time to time. ^[1]