What should I look before buying computer?

Computer has been an integral part of human society The modern day computer has reduced human efforts significantly .The work or job which used to take long hours to rectify or solve can be done with finger tips with a blink of an eye.

The use of modern day computer in research and science made discoveries and new inventions much easier as they can perform complex to complex problem with ease.

They are widely used in educations and online studies students prefer online studies or distance learning rather than the traditional way.

Before buying computer you should take a note on following::

You must look want your needs are let say you want to perform programming you should buy a computer or laptop which supports your programming language some programming language can run or execute on certain pc configurations lesser configuration it does not allow to access.

If you are in the field of designing or graphics you must buy a computer or laptop which has a graphic card installed which supports high resolution images and pictures because low graphic resolution some time does not produce high quality images and pictures..

Some of the best graphic card manufacturer are  :: Nvdia,Asus

You must check for motherboard and its compatibility now question arises what is a motherboard? and its different types? motherboard is nothing but a piece of PCB[printed circuit board] which helps all the other components to be attached such as power supply ,hard disk drive ,dvd rw etc.

Check for hard disk which capacity of hard disk drive is compatible with your motherboard and cpu

Use high quality and high speed ram[random access memory] which enhances the performance of computer and increases the data exchange speed resulting in good speed of computer and laptops.

Check for good quality of Cabinet or computer cases

One of the most important devices is the CPU [central processing unit ] also called as microprocessor .choose high quality processor preferably choose intel which is one of the best and its features are excellent.

 Choose LED monitors over tft or crt because they consume more electricity and need large space of accommodation while led [Light emitting diode ]are thinner and smaller less consumption of heat and electricity is the major advantages while using led monitors over crt.

Examples of led monitors manufacturers:: Dell ,Samsung , I ball , Toshiba

Multimedia wireless keyboards and mouse which are easy to access with no wires which are usually gets damaged when misused in case of wireless there are no such drawbacks just need to install some batteries and you are ready to go::

Some best manufacturer of keyboard and mouse :: Logictech, Iball         

Now after you have chosen all the computer peripherals and devices assembled them and install operating system which ever you prefer I personally suggest you to install windows 10 operating system in to your computer

Some users are also using windows 7 and windows 8 operating system because they fulfill their requirements.

Now you can install operating system by using dvd or pendrive..

How to install windows 8 using usb pendrive ::

1] create a bootable usb pendrive using free software like rufus or win to flash as they are free and easy to use

2] go to cmos setup and change the boot order to pendrive.

3] Follow the instruction which appears on the computer screen and you are ready to go..

How to install windows 7 using usb pendrive ::

1] insert windows 7 dvd in dvd-rw or insert bootable pendrive

2] go to cmos setup or bios configuration and change the necessary setting and restart the computer.

3] Follow the instructions which appears on computer screen .

Final words ::

After Windows installation is completed install all the necessary software and application which you will be using and please don’t forget to install any legal antivirus software which helps computer to protect form harmful viruses and malicious program.

Thanks for reading if you like the article please share and comment if any question do let me know.

What are computer devices and peripherals?

There are 2 types of computer devices

A] Input devices of computer systems

B] Output Devices of Computer Systems

Input devices of computer systems are those peripherals and devices which accepts data in raw format and present this data or instructions to computer for further processing later this data is fetched and we acquire result in readable form.

List of common input devices of computer systems ::

Keyboard

Mouse

Scanner

Trackball

Joystick

LightPen

Touchscreens

Optical Card Reader (OCR)

Keyboard :: Keyboards are used for entering some instruction and presenting data to computer systems.

There are mainly three kinds of keyboards available in market

A] PS2 Keyboard

B] USB keyboard

C] wireless keyboard

Mouse ::It is a input device of computer system which is also a pointing devices and is used for selecting dragging and dropping .

There are also three types of mouse.

A] PS2 mouse

B] USB mouse

C] Wireless mouse

Scanner :: Scanners are used to scan images and documents and helps in storing the data into computer hard disk drives.

Output devices of computer system  are used to produce or receive output from computer when users enters input with the help of input devices such as keyboard or mouse.

The desired output is received from computer in such a form which is easily readable.

For example :: if you have scanned a picture or image with the help of input device such as scanner the image document or picture is saved or stored in computer memory or computer hard disk drive later you can obtain the image in the form of output with the help of printer.

Another example let say you have entered something using keyboard as a input devices you can receive output on the screen of monitors.

Here below I have listed some common examples of output devices::

Monitors

Touch Screens

LCD Monitors or LED Monitors

Printers

Speakers

Headphones

Sound Cards

Monitors ::They are used in producing output and commonly called as VDU[visual display unit] and are used in displaying text image and pictures on their screen.

Before some time people used to use CRT [cathode ray tube] which was a square shape monitor which used to take a lot of space for its installation and consume lot of electricity.

Nowadays people use tft lcd and led for displaying the content and are hugely popular these days due to its low cost and high resolution graphics and images.

Printers:: there are various types of printers available in market dotmatrix ,lazer, inkejet,photo printers which are used specifically for various purposes

For example:: A dotmatrix printer is used for a large volume of print outs where the print quality is low compared to lazer and inkjet printer.

They are used typically in large organizations where there is a need of high volume printouts.

Lazer printers:: They are used where users need a high quality printouts in high volume .

Photo printers ::They are used by professionals and advanced users where they need high quality printouts of images and pictures.

overall explanation on computer terminology

Computer is an electronic machine which accepts data in raw format and process the data in human understandable format modern day computer can store or save incredible amount or volume of data in computer hard disk drive or external sources such as external hard drives or usb pen drives or in DVD’s.

Computer were invented to perform numerical calculations which were difficult to handle and the use of these modern machine has made users life easier compared to old days..

In the first generations of computer they used vacuum tubes which used to emit huge energy while processing and needed large space for accommodation and installations.

Computer are used in health space research military every where they are an integral part of human society and has made a significant role in the development of human race.

Computers have mainly 2 parts computer hardware and software let us discuss on each topic in brief.

What is computer hardware and software?

Computer hardware are the parts or components which are used in computer such as Computer motherboard ,hard disk drives and other peripherals and devices which are commonly used like printer scanner etc.

These components can be touched and feel unlike computer software’s the computer hardware cannot work efficiently without system software and application software’s.

Has the overall development of computer there are several companies which manufacture or developed new technology based hardware components peripherals and devices keeping in mind of users need.

Computer use has a significant role in weather forecasting and educations name any field you will come to know the use of computer and how important it has been in reducing human effort while use and their practice.

Computer peripherals and devices are cheaper these days because of the high intense competition around the IT companies which manufacture these devices these devices are readily available in any part of the world.

Computer software can be divided into two major category .

A] System Software

B] Application Software

System software’s are those software or programs which is must for any computer to perform to its full functions. This software’s are the integral part of computer system.

The common examples of system software are operating system and device drivers.

Operating system directly contact computer devices to functions as it send necessary programs to run and execute.

The famous operating system are msdos which is designed and developed by Microsoft corporation other used operating system of Microsoft are WINXP WIN7 WIN8 etc.

On The other hand mac and linux are famous in some category of users who are highly advanced.

Application software are those software’s which are designed and developed for some specific task which makes the load or burden of the users less as it can do complex to complex functions with a fraction of time and resulting in saving time and money .

Microsoft corporation has also developed some application software for their users which are highly popular such as MS-OFFICE ,there are also pre installed application software which comes directly with the operating system when installed in computer hard disk drive.

For example :: paint.

Some software developer developed software on specific and special demand or requirement of customers .

According to a study the main threat to computer is a virus .

What is a computer virus and its different types?

Computer virus is nothing but a program or code which is designed and developed to harm computers and steal their sensitive information which can be details of credit cards.

Computer virus can delete important system files which are necessary to boot computer they can even delete ,replicate and hide itself and can infect other computer when comes in contact.

The primary source of spreading computer virus is internet and removable device such as hard disk and usb pendrives.

what is dos?

Ms Dos stands for Microsoft Disk Operating System which was developed by Microsoft Corporation for IBM and was called as PC-DOS.

MS DOS is a operating system which is a non gui based and it is operated using some basic and advance internal and external dos commands and used in command shell or command line.

There are different types of operating system and commonly categorized in GUI and NON-GUI msdos belongs to the category of non GUI [Graphical User Interface] where we cannot find any graphics or the use of any mouse like devices.

When Microsoft first launched their GUI based operating system it used to start from dos when a command was types in command shell like win

Dos operating system is not used as often as windows due to its advanced features and easy to use and handle. This OS has ruled the computer industry from few decades and the customer response is amazing compared to old OS such as msdos.

 Before going to further details on how to use dos you must be aware of some basic dos commands and its features to study dos and its internal and external commands you must be familiar with their use and advantages as it would help you immensely to study the topic and get expertise in the field of dos.

Dos Commands are basically divided in mainly 2 types ::

A] Internal Dos Commands

B] External Dos Commands

Internal Dos commands are those commands which are directly executed within the system file called as command.com this file is mainly responsible for all execution and functions of dos internal commands.

If the file is broken or damaged or corrupted it would be hard to execute or run any of the internal dos command.

This file is situated in the root directory of hard disk drive or where you have installed your operating system mainly people or users install operating system on drive C.

Some common examples of internal dos commands ::

Cls ,date ,time,ver ,copy con etc.

Cls ::This command is used for clear all the previous output on the screen.

Date ::This Command is used for displaying current date of the Computer system.

Time ::This command is used for displaying current time of the computer

Ver :: It is used for checking the version of the operating system.

Copy con ::  This command is used for creating a new file .

External Dos Commands :: This commands are executed and run from external source it need supporting files to execute this command cannot run without any supporting files.

These type of files are located in c:\windows\command name directory in windows 98.

These commands are very powerful dos commands which must be used carefully and once used cannot be reverse as it directly affect your computer hard disk drive and its programs as well as its data which is available in computer.

Some of the basic external dos commands are mentioned below::

Format,edit,doskey,xcopy ,copy

Format:: This command is used to format or erase all existing data available on computer hard disk drive.

Edit :: It is used to create or edit or update file which are present in computer.

Doskey :: this command remember all previously used dos commands so that you don’t have to type the same command over and over again.

Xcopy :: It is used to copy all folders including all files and subfolders from one location to another.

Copy :: This command is used to copy all files from one location to another.

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