History of memory

History of memory:-
In 1949 to 1952 developed Magnetic core memory of Computer.
But 1st memory is vacuum tubes of Computer, it can store data. In 1960 became magnetic memory. Magnetic memory is smaller from vacuum tubes. In 1970 develop Semiconductor chips are the type of memory we use today. DRAM(Dynamic random access memory) is the most common kind of random access memory .RAM(random access memory) for personal computers. The data the DRAM chip holds has to be periodically refreshed. SRAM (Static random access memory) doesn't need to be refreshed
In 1834 used punch card (memory of Computer) punch card is very low speed for processing. This time Charles Babbage will create an "Analytical Engine" .the flip-flop is the most common type of memory element of computer. That is Fast computer circuitry.
Of the world.

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How to work a Mouse

In a computer, mouse is an input device. In 1964 the first prototype computer mouse was made to use with a GUI (graphical user interface) for MS DOS. It has two buttons normally. It also has wheels and it also can another element. We know that, the first publication of the term "mouse" as a pointing device is in Bill English's 1965 publication "Computer-Aided Display Control". Mice(Computer) Patent # 3,541,541 issued 11/17/70 for X-Y Position Indicator For A Display System(G.U.I) .

Some systems allow two or more mice to be used at a time. Microsoft Windows 98 to now her any operating system, has supported multiple simultaneous pointing devices.

Mouse is a common pointing device The basic features of a mouse are a casing with a flat bottom, designed to be gripped by one hand; one or more buttons on the top; a multidirectional detection device on the bottom; and a cable connecting the mouse to the computer. The ball mouse (computer) has two freely rotating rollers. They are located 90 degrees apart. One of them roller can detect the forward- backward motion of the mouse and other roller can detect the left–right motion of the Mouse. Opposite the two rollers is a third one (white, in the photo, at 45 degrees) that is spring-loaded to push the ball against the other two rollers. Every roller is on the same shaft as an encoder of the mouse wheel that has slotted edges; the slots interrupt infrared light (L.E.D) beams to generate electrical pulses that represent wheel movement. This is normal work of mouse  

Histrory Of keyboard

Keyboard is an input device of a computer. First mechanical typewriters invented In 1872 and In 1930's electric typewriters were invented first mechanical typewriter, which base is C . Keyboard has different key that

mens typewriter key such as A,B,C(A to Z keys). Keyboard can use Word processing and Text editor and also use another program. it has Function key that mens F1,F2,F3(F1 to F12) also it has Numeric key that mens 0,1,2 (0 to 9) & it has optional key that means clr, alt, del. we tell 101-key, keyboard is a Enhanced Keyboard and many people use this keyboard. We are use keyboard for text document, Game, and programming It is also used Shortcut Key for any Software. Alt key  is a option key.

 The alt key can be operation different place different think. Numeric key also use for calculate keyboard has international code for processing

This code cans modification for nationality. This advantage of Coding, keyboard  is famed of  worldwide for computer user. This cause  popular to us. It is a common input device. Keyboard has many advantage of now.

 I personally think that, keyboard is best of another Input device and It is easy to use. The Mouse rich in popularity of Graphical interfaces in Unix, MS-dos, and OS/2. you know beginning the first mouse was a small wooden box Exactly 40 years ago

Fifth Generation of Computer

Fifth Generation Of Computer:
Fifth Generation Computer is begin in1998.Fifth Generation Computer is future Computer. This generation computing devices, based on artificial intelligence. There has Artificial intelligence Programming Language and it can receive voice command and processing this command. such as voice recognition, that are being used today. Fifth Generation Computer give to us spoken out put Fifth Generation computers that can understand natural languages Fifth Generation Computer perform work like as human.  Fifth Generation Computer also can  solve her problem with own. Her has programming so easy.it also receve a data of phisical man with out any extra enter faceing unit and he use of parallel processing.it has unlimited memory space

Fourth Generation of Compute

Fourth Generation of Compute
Fourth Generation of Compute in 1971. computer invention of the integrated circuit Large scale integration (LSI) The Size started to go down with the improvement in the integrated circuits Ultra Large scale(ULSI) and Very Large Scale(VLSI) ensured that millions of components could be fit into a small chip By the 1980's, very large scale integration (VLSI) squeezed hundreds of thousands of components into a chip.This time was Microprocessor .It has memory unit, Input unit,Output unit Register and also has Central processing unit. And come to us a modern computer.It has Very lower  power cost and Very small size more effective use full.The Intel 4004 chip made in 1971.This time big advantage of computer that data shearing another Coputer that means networking.Two type of networking has famous. number one LAN (Local area network) and number Two WAN (Wide area network)In 1981, IBM introduced personal computers for home and office use. Computer user has doubled from Two million in 1981 and 5.5 million in 1982 and after ten year (1992) 65 million Computer user Wozniak built the Apple II in 1976 and it the first personal computer in a garage in California.Now we use laptop Computer small size of Desktop Computer