Rancho is having an emergency he needs to bring his friends father to the hospital.He brought the old man so his friend thank him for saving hid dad.after that he talk to his friends.ranchos friend a girl always think of him even when watching televinsion she saw Ranchos face she imagine it.In the morning the girl go back to the hospital to remind rancho about his test on the day.Rancho hurriedly go to the test with his 2 friends.They have been late in the submision so the instructor did not accept their test papers but they do something naughty they shufle the papers and run so the instrucror wont know their papers.In the result of the exam his two friends were last but rancho become the first.Meanwhile Raju is looking for rancho he go the house but they had dicovered something Rncho is not rancho the true Rancho is the primeministers son while the other one is their adopted child.So Raju go and find the other rancho to know more.
Martes, Hulyo 26, 2011
History and types of computer
| Computer History Year/Enter | Computer History Inventors/Inventions | Computer History Description of Event |
| | Konrad Zuse - Z1 Computer | First freely programmable computer. |
| | John Atanasoff & Clifford Berry ABC Computer | Who was first in the computing biz is not always as easy as ABC. |
| | Howard Aiken & Grace Hopper Harvard Mark I Computer | The Harvard Mark 1 computer. |
| | John Presper Eckert & John W. Mauchly ENIAC 1 Computer | 20,000 vacuum tubes later... |
| | Frederic Williams & Tom Kilburn Manchester Baby Computer & The Williams Tube | Baby and the Williams Tube turn on the memories. |
| | John Bardeen, Walter Brattain & Wiliam Shockley The Transistor | No, a transistor is not a computer, but this invention greatly affected the history of computers. |
| | John Presper Eckert & John W. Mauchly UNIVAC Computer | First commercial computer & able to pick presidential winners. |
| | International Business Machines IBM 701 EDPM Computer | IBM enters into 'The History of Computers'. |
| | John Backus & IBM FORTRAN Computer Programming Language | The first successful high level programming language. |
| Stanford Research Institute, Bank of America, and General Electric ERMA and MICR | The first bank industry computer - also MICR (magnetic ink character recognition) for reading checks. | |
| | Jack Kilby & Robert Noyce The Integrated Circuit | Otherwise known as 'The Chip' |
| | Steve Russell & MIT Spacewar Computer Game | The first computer game invented. |
| | Douglas Engelbart Computer Mouse & Windows | Nicknamed the mouse because the tail came out the end. |
| | ARPAnet | The original Internet. |
| | Intel 1103 Computer Memory | The world's first available dynamic RAM chip. |
| | Faggin, Hoff & Mazor Intel 4004 Computer Microprocessor | The first microprocessor. |
| | Alan Shugart &IBM The "Floppy" Disk | Nicknamed the "Floppy" for its flexibility. |
| | Robert Metcalfe & Xerox The Ethernet Computer Networking | Networking. |
| | Scelbi & Mark-8 Altair & IBM 5100 Computers | The first consumer computers. |
| | Apple I, II & TRS-80 & Commodore Pet Computers | More first consumer computers. |
| | Dan Bricklin & Bob Frankston VisiCalc Spreadsheet Software | Any product that pays for itself in two weeks is a surefire winner. |
| | Seymour Rubenstein & Rob Barnaby WordStar Software | Word Processors. |
| | IBM The IBM PC - Home Computer | From an "Acorn" grows a personal computer revolution |
| | Microsoft MS-DOS Computer Operating System | From "Quick And Dirty" comes the operating system of the century. |
| | Apple Lisa Computer | The first home computer with a GUI, graphical user interface. |
| | Apple Macintosh Computer | The more affordable home computer with a GUI. |
| | Microsoft Windows | Microsoft begins the friendly war with Apple. |
| | | |
Different types of Computers
Based on the operational principle of computers, they are categorized as analog computers and hybrid computers.
Analog Computers: These are almost extinct today. These are different from a digital computer because an analog computer can perform several mathematical operations simultaneously. It uses continuous variables for mathematical operations and utilizes mechanical or electrical energy.
Hybrid Computers: These computers are a combination of both digital and analog computers. In this type of computers, the digital segments perform process control by conversion of analog signals to digital ones.
Following are some of the other important types of computers.
Mainframe Computers: Large organizations use mainframes for highly critical applications such as bulk data processing and ERP. Most of the mainframe computers have the capacities to host multiple operating systems and operate as a number of virtual machines and can thus substitute for several small servers.
Microcomputers: A computer with a microprocessor and its central processing unit is known as a microcomputer. They do not occupy space as much as mainframes. When supplemented with a keyboard and a mouse, microcomputers can be called as personal computers. A monitor, a keyboard and other similar input output devices, computer memory in the form of RAM and a power supply unit come packaged in a microcomputer. These computers can fit on desks or tables and serve as the best choices for single-user tasks.
Personal computers come in a variety of forms such as desktops, laptops and personal digital assistants. Let us look at each of these types of computers.
Desktops: A desktop is intended to be used on a single location. The spare parts of a desktop computer are readily available at relative lower costs. Power consumption is not as critical as that in laptops. Desktops are widely popular for daily use in workplaces and households.
Laptops: Similar in operation to desktops, laptop computers are miniaturized and optimized for mobile use. Laptops run on a single battery or an external adapter that charges the computer batteries. They are enabled with an inbuilt keyboard, touch pad acting as a mouse and a liquid crystal display. Its portability and capacity to operate on battery power have served as a boon for mobile users.
Personal Digital Assistants (PDAs): It is a handheld computer and popularly known as a palmtop. It has a touch screen and a memory card for storage of data. PDAs can also be effectively used as portable audio players, web browsers and smart phones. Most of them can access the Internet by means of Bluetooth or Wi-Fi communication.
Minicomputers: In terms of size and processing capacity, minicomputers lie in between mainframes and microcomputers. Minicomputers are also called mid-range systems or workstations. The term began to be popularly used in the 1960s to refer to relatively smaller third generation computers. They took up the space that would be needed for a refrigerator or two and used transistor and core memory technologies. The 12-bit PDP-8 minicomputer of the Digital Equipment Corporation was the first successful minicomputer.
Supercomputers: The highly calculation-intensive tasks can be effectively performed by means of supercomputers. Quantum physics, mechanics, weather forecasting, molecular theory are best studied by means of supercomputers. Their ability of parallel processing and their well-designed memory hierarchy give the supercomputers, large transaction processing powers.
Wearable Computers: A record-setting step in the evolution of computers was the creation of wearable computers. These computers can be worn on the body and are often used in the study of behavior modeling and human health. Military and health professionals have incorporated wearable computers into their daily routine, as a part of such studies. When the users’ hands and sensory organs are engaged in other activities, wearable computers are of great help in tracking human actions. Wearable computers are consistently in operation as they do not have to be turned on and off and are constantly interacting with the user.
These were some of the different types of computers available today. Looking at the rate of the advancement in technology, we can definitely look forward to many more types of computers in the near future.
Source:Google.com
Miyerkules, Hulyo 20, 2011
Lunes, Hulyo 18, 2011
Mag-subscribe sa:
Mga Komento (Atom)