saa_jb@Gmail

computer history and generations
 - First generation (1940-1956) Vaccum Tubes 
 
-Second Generation(1956-1963)Transistors 

 
-Third Generation(1964-1971)Integrated circuits 

 
-Fourth Generation(1971-present)Microprocessors

 
-Fifth Generation(present-future)Artificial Intelligence

history:

This is a searchable directory about the history of computers, computing and a timeline of the history of computers and early calculating machines has been included. Our timeline includes developments in the 1600's and their impact on computing. The development of the modern day computer was the result of advances in technologies and man's need to quantify. (The abacus was one of the first counting machines. Calculating machines were sold commercially before the advent of steel manufacturing technologies. Papyrus was something to write on, before we had paper. Writing was a way to record mathematical calculations.) This history of computers site includes the names of early pioneers of math and computing and links to related sites for further study. A new "Timeline of the History of Computers and Related Technologies" has been added. This site was designed to be used by students assigned topics about the history of computers and computing. Original articles are footnoted and related links are included. One important purpose of this Web page, is to debunk myths some people create, such as "we have computers because of the military" (Not true). We have computers because man wanted to quantify as early as the ancient Chinese Dynasties, when they created the abacus and used it for calculating, and adding and subtracting in particular... Babbage and Lovelace were "programming" machines as early as the 1800's before any military computer in this country. 1801 was the creation of the Jacquard loom which used "punch cards". Cathode Ray Tubes (CRTs) have been around since 1885 and the US gov't first used a computer in the 1950's. Great Britain's COLOSSUS was developed before the ENGIGMA, so people trying to perpetuate the importance of the US military in the development of computer technologies is doing a disservice to students. Electronics and related computer development, and the invention of the transistor were all independent of military intent. If anything, even the totalisator machines were created for statistical purposes and have been used for horse racing, not rocket science. I love my Mac, and it has no military background that I am aware of. Military computers did not have integrated circuits like PC computer chips either... Stop saying computer development was military in origin... simply can't back it up with fact. Yes, the military also had old computers, just like my Commodore was old... but they weren't related... no tubes in my commodore, that was different technology altogether than a military monster computer with vacuum tubes... mechanical relays... ta dah... that was hot stuff in that age.

ii)computer of classification

(1) Micro computers: These computers use a microprocessor chip and this chip is used instead of CPU means that this microprocessor chip works as a CPU.
These computers are also called personal computers. Two major types of these computers are laptop or Desktop computers. Only one user uses these computers at time that's why they are also known as personal computers.

(2) Mini Computers: These are powerful computer. These computers come into existence in 1960s at that time mainframe computer was very costly. Mini computers were available in cheap prices, so users start using it.

(3) Mainframe Computer: It as a very powerful and large computer. You can get idea of its power as it can handle processing of many users at a time.
Terminals are used to connect a user to this computer and users submit there task through mainframe. Terminal is a device which has keyboard and a screen. By using terminal users put inputs into the computer and get the output through screen.

(4) Super Computers: As the name "super computer" specifies that these are most powerful computers even than mainframe. Actually, when we optimize a mainframe computer then we get super computer.

(5) Microprocessor: You will find these computers everywhere. Microprocessor chips are used in many devices as I-pod, DVD, headphone etc.

iii)computer components

·                     Computer Case

·                     RAM

·                     Hard Drive (HDD)

·                     Sound Card

·                     Video Card

·                     Power Supply (PSU)

·                     Motherboard

·                     Processor (CPU)

·                     Disk Drives (CD, DVD)

·                     Monitor

·                     Keyboard

·                     Mouse