Computer System

The completed diagram showing four different input & output devices is given below:

printer or screen

Reason — The output unit uses devices like printer or screen to display output in user readable form.

processor and main storage

Reason — The CPU consists of processor to process instructions given to the computer and main storage to store those instructions and intermediate results during the processing phase.

storing data

Reason — CPU is responsible for processing the given instructions which consists of handling control functions, performing arithmetical and logical operations and storing the data and instructions being processed. File management is usually handled by the operating system of the computer.

Below diagram shows an ICT system along with its different components:

For my older friend who is moving away to university but will return home for every holiday, I would suggest a laptop as the ideal type of computer for the following reasons:

1. Portability — Easy to carry between classes and home during holidays.
2. Space-saving — Doesn't require separate peripherals like a desktop.
3. Flexibility — Can be used for academics, entertainment, and socializing.
4. Power efficiency — Energy-efficient for extended usage.
5. Battery life — Decent battery life for on-the-go work.
6. Homecoming convenience — Convenient to pack and carry during breaks.
7. Access to university resources — Optimized for university platforms and materials.
8. Future-proofing — All-in-one solution with built-in display and input devices.

Hardware

Reason — Hardware refers to the physical parts of the computer; the ones that we can touch e.g., keyboard, monitor etc.

Software

Reason — The programs or instructions that tell the computer what to do, are known as software.

CPU

Reason — Central Processing Unit sends signals to other parts of the computer to tell them what to do.

CPU

Reason — Central Processing Unit is the "brain" of a computer system.

Computer hardware are the physical parts that make up a computer system. They are the parts that you can see and touch.

Software is used to provide instructions to the computer so that it can perform certain tasks.

Data are the raw facts from which information is derived.

The Control Unit directs other components of the computer to perform the tasks specified in the program instructions.

Collecting the data and converting it into information is called processing.

Results are obtained from computer through its output unit.

Supercomputer is the most powerful computer.

Computers are faster than human beings.

Computers are immune to tiredness and boredom.

Computers have zero IQ.

Apply judgements on its own in unknown/unexpected situations

Reason — A computer has zero IQ. It cannot make decisions on its own.

Hardware + Software + Data

Reason — A computer is a combination of hardware and software, which transforms some data into information.

Data

Reason — Unprocessed raw facts and figures are known as data.

Processed data put in an intelligent form

Reason — A computer processes data and produces information in a user-readable form.

All the above

Reason — A computer system can display arrival and departure times of flights, display important messages and check seat availability and flight times.

A computer is an electronic device that can perform a variety of operations according to a set of instructions called program.

Computer is a useful device as it can be used in almost all the fields such as :

1. Business and administration
2. Medicine and health care
3. Communications and media
4. Education and reference
5. Science and Technology
6. Research and engineering
7. Manufacturing and delivery
8. Law enforcement by police and government
9. Military operations
10. Music and theatre
11. Household purposes, etc.

The strengths of a computer are as follows:

1. Speed.
2. High Storage Capacity.
3. Accuracy.
4. Reliability.
5. Versatility.

The weaknesses of a computer are as follows:

1. Lack of Decision-Making Power.
2. IQ Zero.
3. No Heuristics.

IPO cycle stands for Input-Process-Output cycle. In IPO cycle, some input is needed to accomplish a task, a process is carried out on the input to obtain the output. A computer also follows the IPO cycle as it takes an input, carries out a process upon it, and produces an output.

The four basic components of a computer system are:

1. Input Unit.
2. Central Processing Unit.
3. Storage Unit.
4. Output Unit.

Computers can be classified into following types :

1. Embedded Computers — These computers are in the form of tiny chips embedded within the circuitry of appliances such as televisions, washing machines, wrist watches, etc.
2. Programmable Computers — These computers can be used as notepads, scheduling systems, address books etc. With cellular phones, these can connect to worldwide computer networks to exchange information regardless of location.
3. Laptop Computers & Personal Computers — These computers are typically used in businesses and at home to communicate on computer networks, for word processing to track finances, to play games etc.
4. Workstations — These computers are similar to PCs but have more capabilities. These are typically found in scientific, industrial and business environments that require high levels of computational abilities.
5. Mainframes — These computers are even more capable than workstations and can be used by multiple users.
6. Supercomputers — These computers are the most powerful computers that are used to process complex and time-consuming calculations. They are used by the largest business institutes/houses, scientific institutions and the defence.