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Types and Components of a computer system (Hardware and Software (Hardware…
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1.4 Type of computers
Tablets
Tablets are relatively new internet-enabled portable computers. They work like a smartphone, they use the touch-screen technology and they usualy don´t have a conventional keyboard, they have the keyboard in the screen. Internet access is by Wi-Fi or by 3G/4G/5G connectivity.
Some features of tablets are: - HD. - Front and back cameras. - Lower weight. - Longer battery life. - Bluetooth. - Flash memory. - Sensors to carry out the following functions: - Proximity Sensors.- Accelerometer, detects movement. - Can use sophisticated speech-recognitions systems.
Advantages in comparison with laptops: - Very fast to switch on. - Fully portable. - Touch-screen technology = easy to use. - Can use several apps as standard. - Don´t generate any heat. - Longer battery life. Disadvantages: - They often have a limited memory. - They can be expensive to run. - Typing can be slow. - transferring of files always has to be done through an app store. - Laptops tend to support more types of file.
Smartphones
Smartphones allow users to do normal phone calls but also has a OS (Operation system) that allows to run applications. Smartphones use internet by Wi-Fi and also by 3G/4G/5G connectivity as tablets.
Smartphones have many functions: - Send and receive mails. - Surf the net. - Global positioning system.- Calendar functions. - Telephone banking. - Voice over internet Protocol. - Streaming videos. - Streaming of music. - Instant acces to socila network. - Instant mesaging.
Advantages: - They are very small in size and lightweight. - Can be use to do phone calls and internet can be use on the move. - Because they use Wi-Fi tthey can be anywhere. - They have hundred of apps. - They have a reasonable battery life. Disadvantages: The small screen make difficult to read texts. - web browsing and camera use can drain quickly the battery. - Memory size isn´t very large. - Not all websites features are compatible with some OS. - Is much easier to loose. -
PC/Desk top Computer
This type of computer is made up of a separate monitor, a keyboard, mouse and a processor unit.
The advantags of Pc Desk tops computers over Laptops are the following:
- Separe parts and connections tend to be standarised = lower costs.
- It tends to have a better specification.
- Power consumption is not critical cause it is plug in a wall socket.
- They are usualy fixed in one location
- Internet is more estable since they are in one place without move.
Disadvantages:
- They are not portable
- As is not portable is necessary to copy files for doing some work elsewhere.
- They tend to be more complicated.
Laptop
It refers to a device that has the keyboard, monitor, pointing device and processor in one single unit. Is very portable.
Key features:
- Lightweight
- Low power consumption
- The processor shouldn´t generate so much heat
Advantages in comparison with a desk top pc:
- Its portability.
- Their are not trailing wires
- They can take full advantage of Wi-Fi
- They can link into any multimedia system
Disadvantages in comparison with a desktop computer:
- They are easier to steal because of their portability
- They have very limited battery life
- The keyboard and their pointing devices can be awkward to use
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Hardware and Software
Application Software
Word Processor: Word processing Software is used to manipulate text docoumentssuch as an essay or a report.
Spreadsheet: Is used to organise and manipulate numerical data. Numbers are organised on a grid of lettered columns and numbered rows.The grid is made by cells. Each cell is identified by using a unique combination of columns and rows.
Control and Measuring Software: Is designed to allow a computer or microprocessor to interface with sensors so it is possible to: - Measure physical quantities. -Control applications by comparing sensor data with stored data and sending out signals.
Photo editing Software: It allows a user to manipulate digital photos on a computer. For ex. change contrast, saturation,etc. They allow a photografer to remove things to do a perfect photo.
Apps: Is the type of software that runs on mobiles or tablets. - Video and music streaming. - GPS. - Camera facilities
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1.3 Operating Systems
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The typical tasks of a OS are: -Control of the opeeration of the input, output and backing storage devices - Supervising the loading, running and storage of application programs. - Dealing with errors that occurr in applications programs. - Maintaining security in all the computer system. - Maintaining a computer log. - Allowing communication between the user and the computer system.
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