Uses of computers
The Uses of computers control most of the working operations in the current economic sectors and, as such works are becoming more efficient, safe, accurate, and cost-effective. The set of computer applications has been observed in the industry and factories, government systems, education, universities and research, military and defense, transport, health and agricultural sectors, and even in families and homes.
For example, a wide range of work in science and engineering is also facilitated by the use of computer technology. Government ministries, departments, and agencies like Medical Store Department (MSD) and local government authorities (LGAS) use various computer applications centralized systems for e-government to provide services to clients. Citizens can pay utility bills via online systems. The government proposes an electronic passport service, make electronic voting, and many other services facilitating computer technology. In business, for example, people can buy and sell over the Internet via e-commerce or e-business. Various mobile money services such as Tigopea, M-Pesa, Airtel Money exist in Tanzania where people use them for e-business and e-banking.
Computer peripheral devices
Devices are devices attached or connected to the computer. They perform different functions. A computer system is a series of interconnected devices that work in coordination with the input-output process. This equipment combination is called computer hardware. Examples of peripheral devices include the monitor, keyboard, mouse, printer, disk drive, speakers, and scanner. The input is the input process data in the computer system. The operation of the process is the manipulation of data in a predetermined manner by the computer itself under the control of a program. The output is the information retrieval process once it has been processed. All equipment other than the computer itself is called peripheral equipment or devices. The computer system illustrated in Fig. 13 below shows the various computer components grouped according to the input operation and the output.
A computer system includes hardware (computers, primary storage, secondary storage, peripheral input, and output devices) (different types of programs - software and system software) and user) and user (without human beings, a computer can not work).
Choosing and buying a computer
Several factors may be taken into account when buying a computer. The most important things to consider include the price of the computer against your budget. Technically, you should check the following issues:
- Do you like the laptop or desktop?
- What brand do you like? Dell, Toshiba, Compaq, etc.
- Which version do you want to use? Window 7,8 or 10.
- processor core (CPU): Two aspects are normally included in the CPU; the type of processor (e.g., Intel) and the speed of the processor measured in Hz.
- Computer Memory (RAM). For small applications, you can get at least 4 GB of RAM, but note that the size of the RAM, the higher the price is high and, therefore, better computer performance.
- Hard disk drive (HDD): This is the space to store your data. Consider the size of the hard disk depending on the amount of data that will be stored on your computer. Normally, the hard disk is measured in terms of GB or TB.
- Graphics: Consider the form of integrated graphics.
- A computer system and operating system: Check if there is a 32-bit or 64-bit operating system. Also, check if it is MS Windows or Linux or another operating system based on SOA.
- Anti-virus software: Check the package viruses and spyware.
- Computer Lifeline: Check the life of the computer to estimate how long it will last.
- ISP: Select a good Internet service provider reliable and dependable (ISP).