Categories, types, and functions of input devices

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The computer input devices are used to enter data into a computer from different sources the data is then processed by the computer. Data can be entered by keying, scanning, recording, pointing, touching, and other modes of data entry. Input devices are found in all computing devices.

Input devices are used to enter data either manually or directly into the computer. They can be categorized depending on how they enter data into the computer. The categories include text input, video and audio input, pointing, gaming, and image and graphic input devices.


Nikon digital camera

Features, types and advantages of digital camera.

A digital Camera is an electronic device that uses optical sensors to capture images and sometimes video into digital data. A digital camera is an input device since it captures physical object and converts it into digital data as input. It captures the image and saves them in pixels which determines the quality and clarity of the image. Most of today`s digital equipment comes with digital cameras that are incorporated or in-built e.g. laptops, smartphones, and many other digital devices. 

Major types of digital cameras are professional Digital Single Len Reflex (DSLR), compact, mirrorless, semi-professional, webcam, and smartphone cameras among other categories. To get a digital camera some of the features to consider are resolution, sensor type, lens, battery life, and storage space among many others discussed below.


central-processing-unit-CPU microchip

Functions, types, and components of processor (CPU)

The computer processor or Central Processing Unit (CPU) is termed the brain of the computer. It is the main component of any computing device that is available. It is usually made of microelectronic components fixed in a microchip.

The main function of the computer processor is to execute instructions and give the required output results. It is made up of 3 main components control unit (CU), Arithmetic Logic Unit (ALU), and the main memory (RAM). Processors can be classified in terms of the number of cores that they have into 6 types, Single, Dual, Quad, Hexa, Octa, and Deca-core.


Types of expansion cards, slots, and their functions

An expansion slot is a connection point with a computer motherboard where an additional component can be added to the computer. Modern computers are designed in a manner that users can add extra functionality when the need arises. 

The expansion slots type range from PCI, PCI Express, AGP, ISA, CPU, and RAM  slots among others. Their main purpose was to add more computer functionality. The functionality could be a better video display, higher processing speed, better gaming capabilities, higher memory, etc.


Types of computer ports, connectors, and their symbols

First let’s try to answer the question, what is a computer port?

A computer port is a physical interface with the computer that is used to connect computer peripherals. 

To connect any external device to a computer you require to use a connector that goes to the port in the computer. Ports are used to connect peripheral devices to the computer motherboard or the casing.

The main ports that are in a modern computer are USB, HDMI, Ethernet, VGA, Power, Serial, PS/2, DVI, Audio, and Firewire among others. They are used to connect different devices to the computer for data transfer and communication. USB is replacing most of these other ports since is simple to connect and convenient.

padlock over data to represent data security

Data security threats and control measures

Data and information are the key components in day to day running of any organization in today’s information age. Data security involves protecting data from theft, unauthorized access, and modification. Information is secured to achieve 3 main objectives namely confidentiality, integrity, and availability of data. The process involves securing all hardware, software, networking devices, and any other device involved in storing retrieval, and transmission of data.

Some of the main threats to data are malware, hackers, and employees’ natural catastrophe among others. To secure data organizations can implement control measures that can be used to mitigate the threats. Some of the data security control measures include using updated antivirus, encryption, firewalls, user access right, and user training among other controls discuss in the article.


Types of computer cooling systems and their functions 

Computer cooling systems are similar to car engine systems. A computer is an electronic device that performs millions of operations per second. This means the electronic components generate a lot of heat. Electronic components like transistors, diodes, and others require a certain temperature for optimum operation.

There are 2 main types of computer cooling systems, air, and liquid. The cooling system is used to ensure that the heat generated by computer components is removed and a cooler environment is maintained.

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3D printer and products

Applications, advantages, and disadvantages of 3D printing technology

3D printing is also known as additive manufacturing since it adds layers on top of others to create objects. Imagine you using utensils in your house and then they slip and break. Instead of going to the store for a new one you move to a printer and print a new better version.

This will be the future of 3D printing. 3D technology enables users to design an object by use of CAD software and then using a 3D printer they can generate the design into a physical object.

3D printing processes are, binder jetting, directed energy deposition, material extrusion, material jetting, powder bed fusion, sheet lamination, and vat photopolymerization. They will help have faster prototypes that can be customized to user needs. The disadvantage of 3D is it requires post-printing activities and currently is use limited types of material.

virtual reality

Advantages and disadvantages of virtual reality technology

Have you ever felt that you need to visit a fantasy place or even a real-life place but cannot? Virtual reality technology may be the future of achieving your dream or at least virtually.

Virtual reality (VR) is the use of computing technology to simulate a specific environment. It helps recreate a virtual environment that creates objects, events, and experiences to mimic the real world. Currently, users experience this by using a virtual reality headset.

Virtual reality is used in education, medicine, entertainment, gaming, design, marketing, tour, and travel among other places. It offers users virtual experiences that they may not be able to get.


Types of computer keyboard keys and their functions

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A computer keyboard is the main input device that almost all computers come with. It is used to enter instructions into the computer by pressing the keys which then send the command to the processor. They can be used in all kinds of devices that use different computer user interfaces from command, menu, and Graphic User Interface (GUI).

The main function of a keyboard is to key in data to the computer/device. It acts as a device input device for data entry. The main types of keyboard keys are functional, alphanumeric, formatting, special, and numeric among many others.