Lesson video

Hi everyone, my name is Mrs. Jenkins.

We are going to have such a great time learning together in today's lesson.

Welcome to today's lesson from the Unit Introduction to computer systems. Today's lesson is called Computer Systems in Society.

And by the end of today's lesson, you will be able to recognise the role of computer systems in our lives.

We have two key words we're going to be looking at today.

Those words are benefit and system.

The word benefit is something that has a good or helpful effect.

The word system is a number of things, parts, components, people that work together to complete or perform a task.

So those words, again, are benefit and system.

We will see these words appear throughout the slides today in our lesson.

We have three learning cycles we're going to look at today.

We have explain how a system works, outline the role of humans in a computer system, and describe the benefits of computer systems. I'm going to start with explain how a system works.

Digital systems are used in a range of public situations.

They're often there to make tasks quicker and easier.

Can you think of any digital systems? First, smart locker system to function effectively, computers are needed.

Computers are needed so that the different parts of the system can communicate with each other.

What would you need to do to cross the road safely here? I asked you, what would you need to do to cross the road safely here.

You would need to press the button, wait for the lights to change, and the cars to stop, then cross the road.

Have you ever noticed this on a crossing? What do you think it is? It's a set of sensors.

The sensors can detect people by the crossing, people on the crossing, cars approaching the crossing.

Some crossings have sensors to detect people, and some crossings run on timers.

Crossings with timers allow pedestrians to stop the traffic so they can cross safely.

They give pedestrians time to cross the road, they indicate when to cross and when not to.

And when someone presses the button, the lights will eventually change.

Crossings with sensors as well as timers stop the traffic for no longer than necessary.

They adapt to pedestrians who are walking at different speeds.

If someone presses the button and then walks away, it doesn't stop the traffic.

The lights will change only if you are standing in the correct place.

When there is a loss of traffic, the lights may wait for a few seconds before changing to let the traffic pass.

How do you think the system uses sensors to make the crossing better? Laura asks, "Why are computer systems used in road crossings?" Without a computer system, the road crossing would need to be run by a human.

The system enables the lights to change based on traffic or pedestrians waiting to cross, making them safer and more efficient.

We've got a little question now.

True or false? Road crossings always use sensors to decide when to change the light.

Have a go.

How did you get on? I asked you true or false.

Road crossings always use sensors to decide when to change the lights.

The answer was false.

The reason why some crossings use only timers, while some use a combination of timers and sensors.

Sensors can help make the crossing more efficient by detecting people and adjusting the times.

Computer systems help run everyday tasks often without us even noticing.

Some tasks are traffic lights, cash machines, supermarket checkouts, airport check-ins, and train time tables.

Laura asks us, "Why are computer systems used in these tasks?" Great question, Laura.

Computer systems are often faster than humans.

They can also run continuously without needing breaks.

Computer systems can communicate with other computer systems. Okay, we have a task now.

I would like you to fill in the blanks, okay? So I've got some sentences.

To use a pedestrian crossing, you first, mm, the button.

Some crossings work on a, mm, so the traffic stops after a set time.

Other crossings have, mm, that detect people waiting at or crossing.

The traffic, mm, change to red to tell cars to, mm.

These features help make sure pedestrians can cross the road, mm.

So you are going to have a go at filling in those blanks for me.

Off you go.

How did you get on? I asked you to fill in the blanks.

So let's have a look at the answers.

To use a pedestrian crossing, you must first press the button.

Some crossings work on a timer, so the traffic stops after a set time.

Other crossings have sensors that detect people waiting or crossing.

The traffic lights change to red to tell cars to stop.

These features help make sure pedestrians can cross the road safely.

Hope you did okay.

We're going to move on to the second learning cycle.

Now that learning cycle is outline the role of humans in a computer system.

Computer systems help us complete many tasks, but humans still have an important role.

Some tasks must be done by humans, while other tasks can be automatic.

A self-service checkout scans the products and processes payment, but a human staff member is still required to assist with errors.

Laura has asked, "What systems require humans and computers to work together?" Jacob has replied, "A catalogue store is a great example of a system where humans and computers work together." Let's have a look.

A catalogue store is an example of how humans and computers work together to form a system.

We have an order point, a warehouse, and a collection point.

What do you think happens at each of these stages? Let's explore it a little further.

At the order point, a tablet is used to look at items to buy.

The tablet shows what is in stock and the price.

The tablet is used to choose items. The customer pays their items and the receipt showing items is printed.

The order is sent to the website.

Which tasks are completed by a computer and which are done by a human? These are the tasks completed using computers.

The tablet is used to look at items to buy, the tablet is used to choose items, the customer pays for their items, a receipt showing items is printed, The order is sent to the website.

While all the tasks were done using a computer, a human customer needs to complete these steps.

Tablet is used to look at items to buy, tablet is used to choose items, customer pays for the their items. Do any of those tasks fit in both categories? Let's have a look at the steps with the warehouse.

Order is received from the shop floor, computer shows staff where items are in the warehouse, the ordered items are picked from the shelf, items are marked off as picked, warehouse computers keep an up to date stock list, items are taken to the shop collection point.

Which of these tasks are done by a computer and which are done by a human? These tasks were completed by a computer.

Order is received from the shop floor, computer shows staff where items are in the warehouse, items are marked off as picked, warehouse computers keep an up to date stock list.

And these are the tasks that were completed by a human.

Computer show staff where items are in the warehouse, the ordered items are picked from the shelf, items are marked off as picked, and items are taken to the shop collection point.

Do any of these tasks fit in both categories? And our final point, the collection point, the tasks go as followed.

Ordered items arrive at the collection point, order ready for collection is displayed in store, receipt showing items ordered is given to staff, shop staff tick off items on the receipt, items are handed over to the customer, and items are marked as collected on the computer.

Which tasks are done by a computer and which are done by a human? These tasks are done by a computer.

Order ready for collection is displayed in store, receipt showing items ordered is given to staff, items are marked as collected on the computer.

These tasks are done by a human.

Ordered items arrive at the collection point, receipts showing items ordered as given to staff, shop staff tick off items on the receipt, items are handed over to the customer, items are marked as collected on the computer.

Do any of these tasks fit in both categories? Okay, let's have a quick true or false here.

True or false? All shop tasks can now be done by computers without human help.

Have a go.

How did you get on? I asked you, true or false? All shop tasks can now be done by computers without human help.

The answer is false.

While lots of tasks can be done by computers, humans are still needed for tasks such as customer service and returns.

While computer systems are used frequently in shops, humans are still needed.

This can be for customer service, carrying products or inputting information into a computer for the system to start.

Let's have a multiple choice now.

Which of these tasks is best suited for a human rather than a computer? A, carrying an item from storage to a customer? B, scanning a barcode? Or C, checking stock levels? Have a go.

How did you get on? I asked you, which of these tasks is best suited for a human rather than a computer? A, carrying an item from storage to a customer? B, scanning a barcode? Or C, checking stock levels? The answer is A, carrying an item from storage to a customer is definitely best suited for a human rather than a computer.

AI or artificial intelligence is also being used more frequently in shop systems. This is changing how shops work.

Some of the changes include self-checkouts that use cameras and AI to spot items in baskets, smart shelves that track stock levels automatically, and AI customer assistance that answer questions online.

You are going to have a go now at our next task, and that is I would like you to identify which items are done by a human and which are done by a computer.

So the tasks we have: customer searches for an item online, system checks if this item is in stock, order is sent to the warehouse, worker collects the item from the shelf, worker scans the item, system updates stock levels, customer collects item from counter.

Have a go.

How did you get on? I asked you to identify which items are done by a human and which are done by a computer.

So customer searches for an item online.

That was both human and computer.

System checks if the item is in stock.

That's computer.

Order is sent to the warehouse, computer.

Worker collects the item from the shelf, human.

Worker scans the item, human.

System updates stock levels, computer.

Customer collects item from the counter, and that was human, well done.

We are going to move on to our third learning cycle now, which is describe the benefits of computer systems. Aisha asks, "What are the benefits of using computer systems to help us?" And Sam has explained, "Computer systems make many everyday tasks easier.

They can help people work faster, make fewer mistakes, and communicate better." Computers can process information much faster than humans.

They can reduce errors in important tasks such as checking stock in a supermarket, tracking flights in an airport, and managing hospital records.

True or false? Computers are only used for entertainment and communication.

Have a go.

How did you get on? I asked you, true or false? Computers are only used for entertainment and communication.

The answer is false.

Computers are used in many ways, such as helping doctors, monitoring weather, and keeping people safe.

Aisha has asked us, "But why is it important to reduce errors?" Some examples include mistakes in banking could result in people not having the correct amount of money.

Mistakes in hospitals could result in people being given the wrong medication or care.

Mistakes in transport could result in people being on the wrong flight.

Aisha says, "But how else do computer systems benefit us?" Sam says, "People can use computers to communicate across the world." Computers can enable people to communicate across the world, including emails and instant messaging for work, this means people are able to work anywhere; video calling family from far away; in-built translation software enabling people to communicate in different languages.

This benefits society because people can stay in touch and share information quickly.

"Are there any other ways computer systems benefit us?" Aisha asks.

Sam's replied, "Computer systems can help keep to keep us safe." There are many computer systems that can be used to help keep us safe, including security cameras, monitoring areas, weather warning systems, medical monitoring devices.

These systems warn of dangers, keeping people informed and save lives.

"How else can computer systems benefit us?" Aisha asks.

"Computer systems can save us time," said Sam.

Which of these are a benefit of using a computer system? A, making tasks faster? B, helping people stay connected? Or C, reducing errors in important tasks? Have a go.

How did you get on? I asked you, which of these are a benefit of using computer systems? A, making tasks faster; B, helping people stay connected; and C, reducing errors in important tasks.

Now actually, all three of these are benefits of using computer systems. Well done everyone.

Computers can help businesses run smoothly by automating tasks.

This means tasks run when needed without a human needing to press a button every time.

This includes online banking, self-checkout, and robots in factories.

Aisha says, "How else do computer systems benefit us?" Sam says, "Computers can be programmed to solve difficult problems." Computers can be used to solve difficult problems. For example, scientists use computers to study diseases and develop medicines, engineers use computers to design buildings and bridges, town planners use computers to predict traffic jams to improve road systems. Aisha says, "Are computers always correct?" And Sam has replied to say, "While they're useful, we cannot just rely on computers to help us." While computers are very beneficial in today's society, it is important to remember that computers are not always right.

Computers follow instructions.

If there is a mistake in the programme, things may not happen as expected or planned.

Humans are still needed to check, update, and fix computer systems. I would like you now on task C to identify a benefit for each of these computer systems. So we have online banking, supermarket self-checkout, smart heating system, traffic light system, digital train timetable, and online appointment booking.

Have a go.

How did you get on? I asked you to identify a benefit for each of these computer systems. So for online banking, you have 24/7 access to money.

The supermarket self checkout means it's often a faster checkout process.

Smart heating system saves energy by adjusting heating automatically.

Traffic light system helps to control traffic safely.

Digital train timetable gives real time updates on train times.

And online appointment booking allows people to book appointments quickly and easily.

Well done everyone.

You have worked so hard today.

Let's summarise what we have learned today.

Computer systems can be used to manage tasks.

By using computer systems, tasks run faster and easier.

Some computer systems do require some input from humans either to start a process or for customer service-related tasks.

Computer systems can benefit society in many ways, such as making roads safer, saving time, and being more efficient.

Well done everyone.

I look forward to learning with you again soon.