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How to keep your system safe

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              How to keep your computer safe and secure  Written by Isekhua Sephen.       December 31,2018. The safety and security of your personal computer is almost certainly something you’ve been dealing with for a long time. If you keep your anti-virus software updated and establish  strong passwords  for your online accounts, changing them on a regular basis, you’ve got all your bases covered. Or, do you? To make your online experience truly secure and keep those identity thieves at bay, read on for some lesser-known tips. 1. Check Your Firewall Checking your firewall sounds complicated, but it really isn’t. If you own a Windows-based system, just go to your control panel and type “firewall” in the search box. If your firewall is “on” or “connected,” then you’re good to go. If you own a Mac, click the Apple icon on your toolbar, go to “system preferences,” then “security,” then “firewall.” Making sure you have a firewall in place can go a long way toward keeping c
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Output devices

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 The concept Output Devices Output devices  are pieces of computer hardware used to communicate the results of data processing performed by a computer.  The objective of output devices is to turn computer information into a human friendly/readable form. There are many examples of output devices, each with their own benefits and drawbacks. LCD & LED Flat Display Screens What is a display screen? Display screens are amongst the most common types of output device.  Thanks to the development of LCD technology, display screens now require less power and are lighter and thinner than their obsolete CRT ancestors.   LCD screens  produce sharp high resolution images. Most display screens are either LCD or LED.  Details of these can be found below. Typical Applications Phone and tablets Laptops and computer screens Televisions Gaming devices Cameras Household appliances Benefits Drawbacks Low power consumption means that displays can be placed on battery powe
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Input Devices

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                           Input Devices  This is a part of the computer used oor entering data and program into the computer system. Common examples of input devices are: 1. Keyboard 2. Joystick 3. Mouse  4. Scanner  5. Light pen  We shall go deep into each of them now. At first we shall discuss on the mouse 1. Mouse  The mouse can be applied by using the right mouse button and the left mouse button, which perform different functions.  2. Keyboard The keyboard is the primary input media for data entry so it only appropriate to be familiar with all the keys and their functions  The keys on the keyboard are divided into 4 main sections  I. The main key section  Ii. The numeric key section  Iii. The function key section Iv. The other key section  3. Diskette  A diskette is made up of a delicate plastic film disk, covered by a woven cloth which helps to infuse dust from the desk  Types of diskette  A. 3.5n or 3 1/2 inch  B. 5.25n or 5 1/4 inch  4. Lightpen
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Computer - Wikipedia

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                             Computer From Wikipedia Open main menu Search Edit Watch this page Read in another language Computer "Computer system" redirects here. For other uses, see  Computer (disambiguation)  and Computer system (disambiguation) . A  computer  is a device that can be instructed to carry out sequences of  arithmetic  or  logical  operations automatically via  computer programming . Modern computers have the ability to follow generalized sets of operations, called  programs .  These programs enable computers to perform an extremely wide range of tasks. Computer             Computers and computing devices from different eras Computers are used as  control systems  for a wide variety of  industrial and  consumer devices . This includes simple special purpose devices like  microwave ovens  and  remote controls , factory devices such as industrial robots  and  computer-aided design , and also general purpose devices like  pe
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