In fact, calculation underlies many activities that are not normally thought of as mathematical. Walking across a room, for instance, requires many complex, albeit subconscious, calculations. Computers, too, have proved capable of solving a vast array of problems, from balancing a checkbook to even—in the form of guidance systems for robots—walking across a room. Before the true power of computing could be realized, therefore, the naive view of calculation had to be overcome.
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- Anatomy Of Digital Computer
- History of computing
- Computer, Analog
- Analog computer
- Classification of Computers by Analog and Digital Signal Processing
- Digital Beats Analog, or Does It?
- Being Analog
- Digital Solutions for Industrial Manufacturing
- Digital media
- Five technology trends augmenting the connected society
Anatomy Of Digital ComputerVIDEO ON THE TOPIC: Analog vs Digital Control Signals: The Basics
A computer is a programmable device that can automatically perform a sequence of calculations or other operations on data once programmed for the task. It can store, retrieve, and process data according to internal instructions.
A computer may be either digital, analog, or hybrid, although most in operation today are digital. Digital computers express variables as numbers, usually in the binary system. They are used for general purposes, whereas analog computers are built for specific tasks, typically scientific or technical. The term "computer" is usually synonymous with digital computer, and computers for business are exclusively digital. The core, computing part of a computer is its central processing unit CPU , or processor.
It comprises an arithmetic-logic unit to carry out calculations, main memory to temporarily store data for processing, and a control unit to control the transfer of data between memory, input and output sources, and the arithmetic-logic unit. A computer is not fully functional without various peripheral devices, however. These are typically connected to a computer through cables, although some may be built into the same unit with the CPU. These include devices for the input of data, such as keyboards, mice, trackballs, scanners, light pens, modems, magnetic strip card readers, and microphones, as well as items for the output of data, such as monitors, printers, plotters, loudspeakers, earphones, and modems.
These devices most often are magnetic tape drives, magnetic disk drives, or optical disk drives. Finally, for a digital computer to function automatically, it requires programs, or sets of instructions written in computer-readable code. To be distinguished from the physical or hardware components of a computer, programs are collectively referred to as software.
A computer system , therefore, is a computer combined with peripheral equipment and software so that it can perform desired functions. Often the terms "computer" and "computer system" are used interchangeably, especially when peripheral devices are built into the same unit as the computer or when a system is sold and installed as a package.
The term "computer system," however, may also refer to a configuration of hardware and software designed for a specific purpose, such as a manufacturing control system, a library automation system, or an accounting system. Or it may refer to a network of multiple computers linked together so that they can share software, data, and peripheral equipment.
Computers tend to be categorized by size and power, although advancements in computers' processing power have blurred the distinctions between traditional categories. Power and speed are influenced by the size of a computer's internal storage units, called words, which determine the amount of data it can process at once and is measured in bits binary digits.
Computer speed is also determined by its clock speed, which is measured in megahertz. Additionally, the amount of main memory a computer has, which is measured in bytes or more precisely, kilobytes, megabytes, or gigabytes of RAM random access memory , plays a role in determining how much data it can process.
The amount of memory that auxiliary storage devices can hold also determines the capabilities of a computer system. The development of the microprocessor, a CPU on a single integrated-circuit chip, enabled the development of affordable single-user microcomputers for the first time. The slow processing power of the early microcomputers, however, made them attractive only to hobbyists and not to the business market. In , however, the personal computer industry got under way with the introduction of off-the-shelf home computers from three manufacturers.
This model became an instant success and set the standard for the microcomputer industry. By the early s personal computers had become the fastest-growing category of computers. This was largely due to the adoption of their use in businesses of all sizes. The availability of these small, inexpensive computers brought computer technology to even the smallest of enterprises.
The most recent category of microcomputer to enter the business world is the portable computer. These small and light—but increasingly powerful—computers are commonly known as laptop or notebook computers. Laptop computers have the same power as desktop personal computers, but are built more compactly and use flat screen monitors, usually using liquid crystal display, that fold down to form a slim unit that fits in a briefcase and usually weigh under 15 pounds.
A notebook computer is one that weighs under 6 pounds and may or may not have a full-size keyboard. A pocket computer is a hand-held calculator-size computer. Portable computers are increasingly popular among businesspeople who travel, such as executives or sales representatives. Today, most computer systems are "open"—compatible with computer hardware and software from different manufacturers.
In the past, all components of a computer system originated from the same manufacturer. There were no industry-wide standards. As a result, printers, monitors, and other peripheral equipment from one manufacturer would not operate when matched with the computer of another manufacturer. More significantly, software could only run on the specific computer brand for which it was designed.
Today, however, "open systems," wherein various equipment from different manufacturers can be matched together, is common. Open systems are especially popular among small business owners because they allow enterprises to upgrade or expand their computer systems more easily and cheaply.
Open systems provide business owners with more buying options, enable them to minimize expenses of employee retraining on new systems, and give them greater freedom to share computer files with outside clients or vendors. Computers on a network are physically linked by cables and use network software in conjunction with the operating system software.
Depending on the hardware and software used, different types of computers may be put on the same network. This may involve computers of different sizes—such as mainframes, mid-ranges, and microcomputers—or computers and peripherals of different manufacturers, which the trend toward open systems has facilitated. Local area networks LANs link computers within a limited geographical area, while Wide area networks WANs connect computers in different geographic regions.
Networks may have various architectures which determine whether computers on the network can act independently. A commonly used system architecture is client-server, whereby a server computer is designated as the one storing and processing data and is accessed by multiple users each at a client computer.
LANs have transformed how employees within an organization use computers. In organizations where employees formerly accessed midrange computers through "dumb" terminals, these employees now typically have more capabilities. These users have their own personal computers at their desks, but are still able to access needed data from a midrange or other server through the network.
Whereas smaller businesses typically favor LANs, WANs are often used by companies with multiple facilities located over a wide geographic area. After all, under a WAN system, a company's databases can be accessed at headquarters in one city, at a manufacturing plant in other city, and at sales offices in other locations.
Computers are used in government, industry, nonprofit and nongovernmental organizations, and in the home, but their impact has been greatest in business and industry. The competitive nature of business has created demands for continuous advances in computer technology and systems design.
Meanwhile, the declining prices of computer systems and their increasing power and utility has led more and more enterprises to invest in computer systems for an ever-widening range of business functions. Today, computers are used to process data in all aspects of a business enterprise: product design and development, manufacturing, inventory control and distribution, quality control, sales and marketing, service data, accounting, and personnel management.
They are also used in businesses of all sizes and in all industry segments, including manufacturing, wholesale, retail, services, mining, agriculture, transportation, and communications. The most common business uses of a computer system are database management, financial management and accounting, and word processing.
Companies use database management systems to keep track of changing information in databases on such subjects as clients, vendors, employees, inventory, supplies, product orders, and service requests. Financial and accounting systems are used for a variety of mathematical calculations on large volumes of numeric data, whether in the basic functions of financial service companies or in the accounting activities of firms. Computers equipped with spreadsheet or database management software, meanwhile, are used by accounts payable, accounts receivable, and payroll departments to process and tabulate financial data and analyze their cash flow situations.
Finally, word processing is ubiquitous and is used to create a wide range of documents, including internal memos, correspondence with outside entities, public relations materials, and products in publishing, advertising, and other industries. Databases may also be used to help make strategic decisions through the use of software based on artificial intelligence. A database system may include—in addition to records and statistics of products, services, clients, etc.
This is referred to as a knowledge base. Examples of expert system usage include business forecasting activities such as investment analysis, financial planning, insurance underwriting, and fraud risk prediction.
Expert systems are also used in activities associated with regulatory compliance, contract bidding, complex production control, customer support, and training. For most small businesses, jumping into the world of computers is a competitive requirement, especially with the advent of the Internet. But computer system purchases can be daunting for entrepreneurs and established business owners alike.
After all, small business enterprises typically have less margin for error than their big business brethren. Given this reality, it is very important for owners and managers to make wise choices when choosing and maintaining computers and computer systems. Four major areas that business owners and managers need to consider when weighing computer options are: 1 your company's overall business strategy; 2 the needs of your customers; 3 the needs of your workforce; and 3 the technology's total cost of ownership TCO.
Although it may well exist in the owner's mind, many small and mid-sized companies have no detailed written system strategy. It is not surprising then, that many of the systems technology implementation decisions are more reactive than they are strategically based. Competitive pressures, the need to catch up to the marketplace, and internal growth tend to force buying decisions. Business owners also need to ensure that their chosen computer system meets the needs of customers.
Is ongoing communication with clients a critical component of your business? If so, then your system should be equipped with features that allow you and your client to communicate via computer in a timely and effective fashion.
Does your business's health hinge on processing customer orders and generating invoices? If so, make sure your system can easily handle such requirements.
Whether introducing a new computer system or making changes to an existing system, businesses inevitably change the ways in which their employees work, and this factor must be taken into consideration.
They can provide practical information on what works well within the current system and what doesn't. Once the changes have been implemented, establish a training program and support structure for all users. This will maximize the benefits of the system and better equip employees to achieve the results expected from the change. Computers should be allocated according to need, not ranking.
Many small businesses neglect to consider the accumulated costs associated with various computer systems when making their hardware decisions. In addition to the original price tag, companies need to weigh hidden information technology costs associated with the purchase. These costs, known as total cost of ownership TCO , include technical support, administrative costs, wasteful user operations, and supplementary expenses printer ink and paper costs, electricity, etc.
Another factor that should be considered is the equipment's useful life. After all, as Hensley noted, "to assure the capability to produce relevant information, technology systems require scheduled investments.
Actually, though, such reasoning ultimately raises business costs. Given today's fast-changing business environment, then, system upgrades are a fact of life. As Joel Dreyfuss noted in Fortune , "if you don't have the latest and always greatest software and hardware on your business computers, your vendors and employees can make you feel that you're just one step away from quill pens and parchment.
Instead, business owners and managers should conduct appropriate cost-benefit analysis, weighing such issues as installation and training costs, compatibility with other systems, usefulness of new features, and current ability to meet business needs, before investing in major computer system upgrades.
Codkind, Alan. October
A computer is a programmable device that can automatically perform a sequence of calculations or other operations on data once programmed for the task. It can store, retrieve, and process data according to internal instructions. A computer may be either digital, analog, or hybrid, although most in operation today are digital. Digital computers express variables as numbers, usually in the binary system. They are used for general purposes, whereas analog computers are built for specific tasks, typically scientific or technical. The term "computer" is usually synonymous with digital computer, and computers for business are exclusively digital.
History of computing
The use of computerized systems within the food processing industry regulated by the Food and Drug Administration FDA continues to increase. The use of computerized system technology is expected to continue to grow in the food industry as the cost of components decrease, as components are continually improved to withstand the rigors of the food processing environment, and as food companies continue to update production facilities, equipment and manufacturing processes in an attempt to produce high quality, high value products. New process design will strive to achieve safe quality products, while at the same time reducing production time and cost. The use of computerized control systems in the production of food products lends itself to fulfilling those goals.
Digital media are any media that are encoded in machine-readable formats. Examples of digital media include software , digital images , digital video , video games , web pages and websites , social media , digital data and databases , digital audio such as MP3 , and electronic books. Digital media often contrasts with print media , such as printed books , newspapers and magazines , and other traditional or analog media, such as photographic film , audio tapes or video tapes. Digital media has had a significantly broad and complex impact on society and culture. Combined with the Internet and personal computing , digital media has caused disruptive innovation in publishing, journalism, public relations, entertainment, education, commerce and politics. Digital media has also posed new challenges to copyright and intellectual property laws, fostering an open content movement in which content creators voluntarily give up some or all of their legal rights to their work.SEE VIDEO BY TOPIC: Analog Supercomputers: From Quantum Atom to Living Body - Rahul Sarpeshkar - TEDxDartmouth
Analog Website. This wiki provides developers using Analog Devices products with software and documentation, including HDL interface code, software drivers, and reference project examples for FPGA connectivity. AM tuning takes some time to get used to. A bit large and heavy with batteries , but forgiveable to accommodate a good internal antenna, and nice built-in speaker. Join us and be a part of the world's premier analog photography community! We provide support, education, and opportunity for film photographers worldwide. This is Kirby's Starterkit. What's New Aug Release version 2.
Alfred is a long-time teacher and computer enthusiast who works with and troubleshoots a wide range of computing devices. Computer signal processing can be achieved through analog, digital and hybrid forms. A signal is converted into electric pulse, radio wave or light by a process known as modulation. While the concept of signal processing can be as simple as an on and off direct current, it is also as complex as alternating or electromagnetic current.
An analog computer or analogue computer is a type of computer that uses the continuously changeable aspects of physical phenomena such as electrical , mechanical , or hydraulic quantities to model the problem being solved. In contrast, digital computers represent varying quantities symbolically and by discrete values of both time and amplitude. Analog computers can have a very wide range of complexity. Analog computers were widely used in scientific and industrial applications even after the advent of digital computers, because at the time they were typically much faster, but they started to become obsolete as early as the s and s, although remained in use in some specific applications, such as aircraft flight simulators , the flight computer in aircraft , and for teaching control systems in universities. More complex applications, such as aircraft flight simulators and synthetic aperture radar , remained the domain of analog computing and hybrid computing well into the s, since digital computers were insufficient for the task. This is a list of examples of early computation devices which are considered to be precursors of the modern computers. Some of them may even have been dubbed as 'computers' by the press, although they may fail to fit the modern definitions. The Antikythera mechanism was an orrery and is believed to be an early mechanical analog computer, according to Derek J. It was discovered in in the Antikythera wreck off the Greek island of Antikythera , between Kythera and Crete , and has been dated to circa BC during the Hellenistic period of Greece. Devices of a level of complexity comparable to that of the Antikythera mechanism would not reappear until a thousand years later.
Classification of Computers by Analog and Digital Signal Processing
I2S Receiver. This clock is used to drive the digital audio data across the link between the codec and CPU. Most have Word Clock generators built- in, some take their clock signal from another device. Input Signal. Signal with Jitter. RODH wood alarm clock make you bedroom modern and comfortable! We are dedicated to helping people achieve high-definition sound both in the recording studio and home environment.
Digital Beats Analog, or Does It?
The world is abuzz with the brave new digital world. What used to be laborious and time consuming, inefficient and unreliable is now effortless, efficient, ultra-reliable, blisteringly fast and hip, a mere matter of pointing and clicking. Is that what we want — sucking the analog world into a maelstrom of digitization? Is that possible, and to what extent? What would it mean anyway, and what is it that distinguishes the two worlds, analog and digital? Besides the digital computer there was once an alternative: the analog computer. They were ingenious machines, but went out of fashion.
A digital computer employs physical device-states as symbols, but an analog computer employs them as models. That is, in a digital computer the on-off states of transistor devices are used to stand for 0s and 1s, which are made stand for phenomena of interest, such as words, data, pixels, or the like; in an analog computer , the continuously variable states of various electronic devices are made to behave like some physical system of interest. A rough parallel would be using pencil-and-paper mathematics to determine the carrying capacity of an arch design symbolic computing versus building a scale model out of balsawood and seeing how much weight it will bear analog computing.
Digital Solutions for Industrial Manufacturing
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We humans are biological animals. We have evolved over millions of years to function well in the environment, to survive. We are analog devices following biological modes of operation.
Five technology trends augmenting the connected society
Rapid advancements in the use of machines to augment human intelligence are creating a new reality in which we increasingly interact with robots and intelligent agents in our daily lives, both privately and professionally. The list of examples is long, but a few of the most common applications today are found in education, health care, maintenance and gaming. My vision of the future network is an intelligent platform that enables this new reality by supporting the digitalization of industries and society. This network platform consists of three main areas: 5G access, automation through agility, and a distributed cloud.