The computer, apparently, is the thing that is sitting right in front of you.  Somewhere out there, the majority acclaimed that the first computer is the abacus which was invented 5000 years ago in Asia.  however, as technology gets highly advanced, the definition and appearance of the computer has changed. 

The first computer, or "modern computer" was invented in World War II by a German engineer, Konrad Zuse in 1941 called the Z3.  What it generally functioned is not ICQ-ing or sending emails, but designing German airplanes.  Further to his, the Allied forces introduced another version called Colossus in 1943, assisting in deciphering German codes and messages.  Since these contribute mostly for war purposes, while Z3 was invented by the defeaters and Colossus helped the winners, they could not be released due to their own safety and were kept as top secrets in clandestine.  Mark I by Howard H. Aiken was the next version developed.  It was very large and took up 1/2 of a football field, but it contributed greatly in creating "ballisitc charts for the US Navy" during combats.  The next one was the Electronic Numerical Integrator and Computer (ENIAC) by John presper Eckert and John W. Mauchly, which serves quite the same as Mark I, just that it was 1000 times faster.  Others that were were EDVA invented in 1945 and UNIVAC I invented in 195.  The great outbroke came when John Bardeen, Walter Brattain and William Shockley invented the transistor at Bell Labs in 1947.  The transistor was great!  It could store memories, operate programs, and change computer  languages.  More researches on computers were made which helped ratified them in every way.  Reducing the sizes was one of all successes.

We have set up polls and asked which part of the computer do people want to know most about.  It's the screensaver!  Therefore,  we have here how the screensaver of a computer works:

• To find out whether it can start the screensaver or not, Windows sends a message to the foreground application. This command is asking the application, "Can I start the screensaver?" A non-Windows program will not understand the command, and therefore will not answer it. A CBT application will understand it, but will respond with a command that means "No, I'm providing training right now." All other applications should respond positively to the command.

   

• Windows then looks at the line SCRNSAVE.EXE=____ in the system.ini file to see if a screensaver has been specified. If the entry is blank, it ignores the command to execute the screensaver. But if a filename is listed, it attempts to load that file. As long as the file listed is an actual screensaver, the program executes and creates the screensaver images on top of the current desktop.

   

• The screensaver continues to run until Windows detects input from the keyboard or mouse. With most screensavers, moving the mouse or pressing any key will immediately terminate the screensaver. But screensavers can be programmed to stop when only certain keys or buttons are pressed, or when the mouse is moved a certain distance. This feature is especially useful in interactive screensavers.

   

• When Windows gets input that it should terminate the screensaver, it checks to see if password protection is turned on. If it is, a box pops up requiring that you enter a user name and password. Otherwise, the screensaver simply terminates.

  When password protection is active, failure to supply the correct name and password will cause Windows to continue to run the screensaver program. While this provides some security, it is important to note that Windows 95/98 screensavers create their own password dialog boxes, and request the password and user information from the system. If you are not certain of the reliability of the source of the screensaver, be careful about using password protection. Hackers can and do create screensavers that use this weak point in system security to capture passwords. This is not an issue with systems running Windows NT, which only allows screensavers to call up the system password dialog box -- they can not create their own

                 --www.howstuffwork.com       

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