Types Of Computers Essay

4764 words - 19 pages

Mainframe computerA 1990 Honeywell-Bull DPS 7 mainframe CPUMainframes (often colloquially referred to as big iron) are large and "expensive" computers used mainly by government institutions and large companies for mission critical applications, typically bulk data processing such as censuses, industry/consumer statistics, ERP, and bank transaction processing.The term during the early 1970s with the introduction of smaller, less complex computers such as the DEC PDP series, which became known as minicomputers or just minis. The industry/users then coined the term "mainframe" to describe larger, earlier types (previously known simply as "computers").DescriptionModern mainframe computers' abilities are not so much defined by their performance capabilities as for their high-quality internal engineering and resulting proven reliability, "expensive" but high-quality technical support, top-notch security, and strict backward compatibility for older software. These machines can and do run successfully for years without interruption, with repairs taking place whilst they continue to run. Mainframe vendors offer such services as off-site redundancy -- if a machine does break down, the vendor offers the option to run customers' applications on their own machines (often without users even noticing the change) whilst repairs go on.Mainframes often support thousands of simultaneous users who gain access through "dumb" terminals or terminal emulation. Early mainframes either supported this timesharing mode or operated in batch mode where users had no direct access to the computing service, it solely providing back office functions. At this time mainframes were so called because of their very substantial size and requirements for specialized HVAC and electrical power. Nowadays mainframes support access via any user interface, including the Web. Blade servers rather than mainframes are now increasingly requiring "exotic" cooling technologies.Market contextNearly all mainframes have the ability to run (or "host") multiple operating systems and thereby operate not as a single computer but as a number of "virtual machines." In this role, a single mainframe can replace dozens or even hundreds of smaller servers, reducing management and administrative costs while providing greatly improved scalability and reliability. The reliability is improved because of the hardware redundancy noted above, and the scalability is achieved because hardware resources can be reallocated among the "virtual machines" as needed out of total system capacity. Mainframes can add system capacity nondisruptively, instantly, and granularly -- what IBM marketing, with justification, describes as "on demand computing." Modern mainframes, notably the zSeries servers, offer at least three major levels of virtualization: logical partitions (LPARs, via PR/SM), virtual machines (primarily via z/VM), and the protected and virtual addressing and workload management of their operating systems, notably...

Find Another Essay On Types Of Computers

Computer will rule the world Essay

1187 words - 5 pages , which are checking our computers for dangerous viruses. If we install one of them and we could feel safe. Until new viruses will appear. But even then our computers could be secure, we can download up-to-date version of our anti - virus, thanks to the Internet.4. Computer games can be very violent and bloody. There are a lot of types of computer games. For example, there are adventure games, Role-Playing Games, racing games, arcade, educational

Computer Uses Essay

2286 words - 9 pages Russell 1 There is hardly anybody around who can say his or her lives have not been influenced by computers. Computers have all but taken over society as we know it. Everywhere you look, computers have greatly improved our lives. It can be as simple as going through a carwash, a computer processes the information that we feed it and adjusts the machine accordingly to give us the particular wash we paid for. Everyday we experience these types of

America and Computer Technology

803 words - 4 pages easier for customers to quickly see all a store has to offer and their prices. Online shopping is also very convenient because it’s available 24/7, whereas actual stores aren’t. Using the computer to shop online is a great way to save money and time. One of the biggest ways computers are used is for socializing with friends. There are tons of different social networking sites and types of chat rooms or instant messaging services. People can

The History of Computers

1215 words - 5 pages a computer with only one program built into it or a customizable computer that can run different programs and also be available for programming new programs. These two types of computers can be found all over the society, in cars, households, stores, infrastructure etc. History The first computer device was created by a mechanical engineer and polymath named Charles Babbage. He is considered as ”father of the computer” since invented the

History of Computers

1831 words - 7 pages rates than older models. Most computers at this time were termed 'mainframes' due to the fact that many computers were linked together to perform a given function. The primary user of these types of computers were military agencies and large corporations such as Bell, AT&T, General Electric, and Boeing. Organizations such as these had the funds to afford such technologies. However, operation of these computers required extensive intelligence

Why we Should have computers in elementary classrooms

731 words - 3 pages motivation and self-esteem, improving their learning method/s, and having more effective communication and collaboration. Using computers in the classroom would greatly increase the inspiration and self-esteem of elementary kids. “The U.S. Department of Education published a report that established that elementary school students gain a significant level of skills using a broad range of computer software,” stated by Gray. There are different types of

Computer Hardware Suggestions

622 words - 2 pages computers and hardware and determining what types of services your clients desire you can make the best choices. The second step that would be taken is to identify what the company already has. To do this I would take a print out of the detailed report of computers hardware. For the software I would I would identify the primary functions and its current capabilities. After following these steps I would further assist with the advice in helping with

The Basics of Computers

4485 words - 18 pages to control machines from fighter aircraft to industrial robots, digital cameras, and even children's toys.4) Types of ComputersClassification of electronic computers may be based on either their principles of operation or their configuration.4.1) Classification based on Principles of OperationBased on the principles of operation, computers are classified into three types.1.Analog 2. Digital 3. Hybrid4.1.1) Analog ComputersAnalog Computer is a

A Moment at It’s Worst

1445 words - 6 pages instead. They have been built to keep all types of data and analysis to become smarter than natural intellect, which will cause problems for humans. Skynet suggests that computers will improve themselves, making better and newer technology and will enslave or annihilate humans (Goertzel 5). Computers will take into account of not wanting a necessity for being controlled by a human that is not as smart as them. Nick Bostrom, who is a director of

The Computer Industry

1922 words - 8 pages governments about computer technology. History of Computing Learning the history of computers can be challenging because of how the complexity of computers have changed drastically through the years. There have been many evolutions with computers such as the speed and the different types of computers built. Computers have been brought into many industries such as telephone, automobiles, and cameras. This development has produced a huge industry for

History Of Computers

2191 words - 9 pages Computers play a very important role in modern-day life and effect us no matter where we are or where we go. There are many different types of computers, some as old as 5,000 years. It is believed that the first computer was the abacus. This device allows users to make computations using a system of sliding beads arranged on a rack. Early merchants used the abacus to keep trading transactions. But as the use of paper and pencil spread

Similar Essays

Computers In The Medical Field Essay

1646 words - 7 pages and infrared cameras. The generation of 3-D images is widely used because of computers (Oak). Appointments, procedures, patient information are all stored into computers. In the United States, almost all of the medical fields make use of computers. Some uses are quite difficult, for example the incorporation of touch screens and also off-site data storage. Some surgical procedures are computer-guided. These types of surgeries mean that the

Did Computers Really Change The World?

1937 words - 8 pages War sometimes governments use computers to improve situations and economies. Governments use several different types of computers. One use of computers is proper identification that can be scanned and recognized by computers because of the lack of trust in the accuracy of human recognition (Harper et al 20). Governments control healthcare, securities, industries, and more. The impact computers have on governments is through information and

Is Society Becoming Too Dependent On Computers

922 words - 4 pages than twenty percent of their brains, and with computers doing most of our work, this number is slowly decreasing. Supporters of pro-computer usage state that we are in the age of technology and the computer can only move us forward. These devices play a huge role in our lives one way or another. They have many purposes and are used in various types of environments, such as medical facilities, offices, and many households. The world would be

Brief History Of Computers Essay

523 words - 2 pages In the first 45 years, numerous advances have been made in the subject of computer science. Not just numerous, but very notable as well. From the abacus to the laptop today, computers have sure come a long way.First generation computers were usually called ENIAC. They used vacuum tubes. These types of computers became too hot to use for a long period of time. They were also very big. In 1959-1964, the second generation of computers came along