Page 27 - Computer

Questions

1. How does the payment system recognise Kole? Computer Science
2. What is the role of encryption during transactions?
FOR ONLINE READING ONLY
3. What information must be encrypted?

Meaning of computer systems
Modern life is determined by the ability to process large amounts of data quickly
and accurately. Nowadays, computers perform complex tasks, solve problems,
and connect with the world. Such abilities were not easy a few decades ago. These
abilities are enabled by advancements in the field of Computer Science and related
technology. A computer is an electronic device that processes data and transforms
it into information that is useful to people. A computer, regardless of its size, type,
or purpose, is controlled by a set of instructions that tell the machine what to do.
Therefore, a computer system is a complex arrangement of hardware, software, user,
and data that work together to perform various tasks and processes.

Components of computer systems

The fundamental components of computer systems include hardware, software, and
users. Understanding the components of computer systems is essential for realising
how computer systems function.

Hardware: These are physical components of a computer system that can be seen
and touched. They are used for performing various tasks, including entering and
displaying data and processing the data. Examples include mouse, keyboard, RAM,
and monitor. More details of computer hardware will be covered in Chapter Three.
Figure 2.1 shows different hardware that form a simple computer system.
PSU
Expansion cards CPU cooler CPU
RAM

SSD Computer case
Motherboard
HDD

Speakers Monitor
Mouse Keyboard

Figure 2.1: Different hardware that forms a simple computer system

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Student’s Book Form One