Windows Registry

The Registry is the central configuration database where windows stores and retrieves startup settings, Hardware and software configuration information and information for local user accounts. Logically, the registry is divided into five sections called subtrees; each subtree is further subdivided into keys that contain individual data items called Value Entries. The Registry is stored on the disk as group of files.

EDITING THE REGISTRY:
                                                  You can view and edit the contents of  the registry directly using registry editor tool, regedit.exe. However, most of the changes to the registry are made automatically by the system , by hardware devices, and by applications. Its is rarely necessary to edit the registry directly. Be careful in changing the values in registry because it make definite change in the settings of the windows or cause any problem. Back up the Registry files first, In case we have any problem we can restore to default. Otherwise it is difficult to find and fix the problem.

TO RUN THE REGISTRY EDITOR:
1.Choose start-->Run.
2.To run Registry editor, type regedit in the Text box and click OK.

                                                                     Run regedit

 

Windows Registry Editor

 

Command Prompt in Windows Versions

Windows provides a Command Prompt interface that enables you to enter text based commands or run command line-tools. Command-line tools accept only text input, and they output information is either in text or by opening a graphic display window. You can use command-line equivalent of graphical tools to create batch programs or scripts that automate administrative tasks. Some administrators and power users might also find command-line management to be more streamlined and efficient than working through a graphical interface.

             COMMAND PROMPT SCREEN:


To Open Command Prompt:
1. Click Start
2. Choose All Programs-->Accessories-->Command Prompt. 

Another Method by using Run:
Enter the Command as cmd in Text box and click Run.


VARIOUS COMMAND USING IN WINDOWS COMMAND PROMPT:

To See Various Command by Click the Link of other site given Below.

http://www.7tutorials.com/command-prompt-how-use-basic-commands

Operating System (OS)

An Operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system. Application programs usually require an operating system to function.

                OPERATING SYSTEM FLOW CHART:


There are many operating system providers. They are,
1. Microsoft windows
2. Unix
3. Linux
4. Apple Macintosh.


WINDOWS:  Windows is released by the Microsoft corporation. It is the popular operating system, because it is easy to use. Older versions namely Window DOS are command based operating system.
There are many versions in windows operating system. They are,

1. Windows DOS
2. Windows NT
3. Windows 95 & 98 in 9x group
4. Windows 2000
5. Windows server 2003
6. Windows XP
7. Windows Vista
8. Windows 7  and
9. Windows 8 (Recently released).

For more details visit Microsoft Website.


UNIX: Unix is a trademark family of operating system originally developed at Bell Laboratories.
There are many versions of Unix. To know more information and to download www.opengroup.org.
Older versions of Unix are command based operating system.

LINUX: Linux is an open standards UNIX derivative originally developed and released by a Finnish computer science student named Linus Torvalds. There are many Linux Distributers namely,
1.Red Hat Linux
2.Mandriva Linux
3.Debian
4.Gentoo
5.Ubuntu etc.

To download: Search in Google for various distributers Websites.


APPLE MACINTOSH: Apple computing, Inc. markets the proprietary Macintosh Operating System with its Own graphical user interface design.
There are many versions of Macintosh. They are,
1. Mac OS X Tiger
2. Mac OS X
3. Mac OS X Mountain Lion.

For more details visit Apple website.

                        
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Webcams

A Camera that is used to send periodic images or continuous frames to a website for display.
Webcam software usually captures the image as JPEG or MPEG files and uploads them to web server. Webcam images can also be accessed using some instant messaging software and by some video applications. Some corporations use webcams as a security measure. Webcam also used to video chat using some special messaging software and internet. Generally webcams are fixed at top of the monitor. In Portable Computer like Laptops, Webcam is very small that permanently fixed or(in build) at the top centre of the display and it is connected internally. Webcam in normal Desktop Computers or connected by using FireWire or USB Cable. Some times webcam driver software also needed.

                  DESKTOP COMPUTER WEBCAM

                    INBUILD LAPTOP  WEBCAM

 

BioMetric Devices

Biometrics  is an automated method of recognizing a person based on a physiological or behavioral characteristic, such as retina pattern , fingerprints or voice recognition. Biometric technologies are becoming the foundation of an extensive array of high secure identification and personal verification solutions. Using these input devices ensures the security of a user's data.

     BIOMETRIC RETINA PATTERN SCANNER

    BIOMETRIC FINGERPRINT SCANNER

 

 

 BIOMETRIC VOICE RECOGNITION DEVICE

 

Touch Pad

A Touch Pad is a small, touch-sensitive pad where you run your finger across the surface to send electronic signal to the computer to control pointer drawn on the screen. Touch Pad can have buttons like mouse or the Touch Pad can be configured to detect finger taps on its surface and process those signals like a button click.

        WIRELESS TOUCH PAD

 Touch Pad also support many function like mouse, They are given below,

       FUNCTIONS AND INSTRUCTIONS IN TOUCH PAD

Digital Camera

What is Digital Camera?
                  
ANSWER:                                     
                    A Digital Camera that uses electronic signals to capture and store photographic images and video images. The resulting files are often  stored on embedded memory cards, removable memory cards, or optical disks. Connecting the digital camera or its removable memory card to a pc enables you to save, manipulate, print and otherwise work with the images. Nowadays digital camera also have microphone to record voice when take video. The digital camera also has play video and image facility by having small screen on the rear of the camera.
The digital camera transfer photos or video to computer by  means of USB cable or FireWire cable.
The cable that connect camera to computer is generally included with camera when you buy.

                                                 
                 DIGITAL CAMERA FRONT VIEW

 

 

 

               REAR VIEW OF DIGITAL CAMERA