9. OCR A Level (H046-H446) SRL3 - 1.1 Input, output and storage devices

Summary

This video explores the roles of input, output, and storage devices in computer systems. It explains that input devices like mice and microphones send data to computers, output devices like screens and speakers convert data into human-readable formats, and storage devices like hard drives and USBs save data. The video also discusses the dual nature of devices like gaming controllers, which can act as both input and output. It concludes by applying these concepts to a real-world scenario, like an ATM system, highlighting the integration of various devices for data processing and user interaction.

Takeaways

• 🖥️ Input devices are used to pass information into a computer system, such as a mouse, keyboard, microphone, barcode scanner, and webcam.
• 📺 Output devices convert digital data into human-readable formats like sound, images, or vibrations, including displays, printers, projectors, headphones, and speakers.
• 💾 Storage devices are for temporary or permanent data storage and can be internal (like RAM, SSD, HDD) or external (like DVDs, USB drives, memory cards, external HDDs).
• 🎮 A gaming controller is primarily an input device, translating user actions into digital signals, but also has output features like built-in speakers and vibration feedback.
• 🤖 Modern controllers act as complete embedded systems with their own processors for handling data input and output.
• 📚 For exams, it's important to understand the primary function of devices like gaming controllers, even if they have multiple capabilities.
• 🏧 In a cash point system, input devices include card readers, keypads, buttons, and cameras, while output devices are monitors, printers, speakers, and cash dispensers.
• 💼 Behind the scenes of a cash point system, there's likely internal storage and main memory acting as storage devices.
• 📝 Memorizing a list of input, output, and storage devices is useful, but understanding how to apply them in different scenarios is crucial.
• 🔍 The video emphasizes the importance of justifying your answers in exams when discussing the application of these devices in computer science.

Q & A

What is an input device?

An input device is any device that allows you to pass information from the outside world into a computer system, such as a mouse, keyboard, microphone, barcode scanner, or webcam.

How does an output device differ from an input device?

An output device takes data stored in digital form and converts it into another format that humans can process, like sound waves, images, or vibration feedback, whereas an input device captures data from the physical world to be processed by a computer.

What are some examples of output devices mentioned in the script?

Examples of output devices mentioned include a visual display unit, printer, projector, headphones, and speakers.

Define a storage device as described in the video script.

A storage device is any device used for either temporary or permanent storage of data. It can be internal, like RAM, solid-state hard drives, or magnetic hard drives, or external, like optical disks, USB pens, memory cards, or external hard drives.

What is the role of a gaming controller in terms of input and output?

A gaming controller acts primarily as an input device by translating button presses and joystick movements into digital signals. However, it also has output capabilities, such as built-in speakers and vibration feedback.

Why might a gaming controller be considered an embedded system?

A gaming controller might be considered an embedded system because it likely has its own processor that processes data before sending it to the console and interprets data to produce output.

What should one consider when determining if a gaming controller is an input or output device?

One should consider the primary function of the gaming controller, which is to input data into a computer system. However, the presence of output features like speakers and vibration feedback also blurs the lines.

What are the key input, output, and storage devices that might be used in a cash point system?

In a cash point system, input devices include card readers, keypads, buttons, and cameras. Output devices include monitors, printers, speakers, and actuators for dispensing cash. Storage devices are likely internal secondary storage and main memory.

How does the video script suggest approaching the understanding of input, output, and storage devices for an exam?

The script suggests understanding and listing various devices, but more importantly, knowing how they can be applied and used in different scenarios or situations.

What is the significance of knowing how to apply input, output, and storage devices in computer science?

Knowing how to apply these devices is crucial for solving real-world problems and understanding their roles in various systems, which is a key aspect of computer science applications.

What advice does the script give for answering questions about devices in an exam?

The script advises to fully justify your answer in the exams, acknowledging that there can be some subjectivity in categorizing devices, especially in cases where they have both input and output functions.

Outlines

00:00

🖥️ Input, Output, and Storage Devices Explained

This paragraph introduces the concepts of input, output, and storage devices in computing. Input devices are those that allow data to be entered into a computer system, such as a mouse, keyboard, microphone, barcode scanner, and webcam. Output devices convert digital data into a human-readable format, like visual displays, printers, projectors, headphones, and speakers. Storage devices are used for temporary or permanent data storage and can be internal (e.g., RAM, solid-state drives, magnetic hard drives) or external (e.g., DVDs, USB drives, memory cards, external hard drives). The paragraph also discusses the complexity of classifying devices strictly as input or output, using a gaming controller as an example that serves both functions. It emphasizes the importance of understanding how these devices can be applied in different scenarios, such as in an ATM system, which uses card readers, keypads, buttons, cameras, displays, printers, speakers, and cash dispensers as input, output, and storage mechanisms.

05:01

💾 Application of Devices in Computer Science

The second paragraph focuses on the practical application of input, output, and storage devices in computer science. It poses a key question about how these devices are used in typical computer science applications and encourages viewers to consider how they might answer this in an exam setting. The paragraph concludes with a reminder that while knowing the types of devices is important, understanding their application and usage in various situations is even more crucial.

Keywords

💡Input Device

An 'Input Device' is any hardware that allows data to be entered into a computer system from the external world. This is a fundamental concept in the video as it sets the stage for understanding how computers interact with users and their environment. For example, a mouse, keyboard, and microphone are mentioned as typical input devices. These devices translate human actions into digital signals that a computer can process.

💡Output Device

An 'Output Device' is used to present data stored in a computer in a human-readable form. The video explains that these devices convert digital data into formats like sound, images, or vibrations. Examples given include visual display units, printers, projectors, headphones, and speakers. This concept is crucial as it completes the loop of human-computer interaction by providing feedback to the user.

💡Storage Device

A 'Storage Device' refers to any device used for holding data, either temporarily or permanently. The video distinguishes between internal storage like RAM, solid-state drives, and magnetic hard drives, and external storage like DVDs, USB pens, memory cards, and external hard drives. Understanding storage is key to knowing how data is preserved and accessed by computer systems.

💡Gaming Controller

The 'Gaming Controller' is highlighted in the video as an example of a device that blurs the line between input and output. While it primarily serves as an input device by translating button presses and joystick movements into digital signals, it also has output capabilities like built-in speakers and vibration feedback. This dual functionality illustrates the complexity of modern devices.

💡Main Memory (RAM)

Main Memory, or RAM, is a type of volatile storage that holds data while the computer is running but does not retain the data when the system is powered off. The video mentions it as an example of internal storage, emphasizing its role in temporary data storage and the speed at which it allows data to be accessed and processed.

💡Solid State Drive (SSD)

A 'Solid State Drive' is a type of non-volatile storage device that uses flash memory to store data. The video includes it as an example of internal storage, highlighting its speed and durability compared to traditional magnetic hard drives. SSDs are integral to modern computing for their performance and reliability.

💡Magnetic Hard Drive

A 'Magnetic Hard Drive' is an older form of non-volatile storage that uses magnetic platters to store data. The script mentions it as another example of internal storage, contrasting it with SSDs in terms of speed and physical vulnerability. It's still widely used for mass storage due to its larger capacity and lower cost.

💡Optical Disk

An 'Optical Disk', such as a DVD or Blu-ray, is a type of removable storage medium that uses laser technology to read and write data. The video includes optical disks as examples of external storage, illustrating how they are used for long-term data archiving and distribution of software or media.

💡USB Pen

A 'USB Pen', also known as a USB flash drive, is a portable storage device that plugs directly into a computer's USB port. The video lists it as an example of external storage, emphasizing its convenience for transferring files between computers or for backup purposes.

💡Memory Card

A 'Memory Card' is a small, removable storage device used in various portable devices like cameras and smartphones. The script mentions it as an example of external storage, highlighting its role in capturing and storing data from these devices for later transfer or use.

💡External Hard Drive

An 'External Hard Drive' is a portable hard disk drive that connects to a computer via an external interface, often USB. The video includes it as an example of external storage, noting its utility for扩充存储容量 and providing a means to back up data.

💡Cash Point System

A 'Cash Point System', or ATM, is used as an example in the video to illustrate the application of input, output, and storage devices in a real-world scenario. The system uses card readers, keypads, and cameras for input, a display and printer for output, and likely has internal storage for transaction data, demonstrating how these devices work together in a practical application.

Highlights

Input devices allow information to be passed into a computer system.

Typical input devices include a mouse, keyboard, microphone, barcode scanner, and webcam.

Output devices convert digital data into formats humans can process.

Examples of output devices are visual display units, printers, projectors, headphones, and speakers.

Storage devices are used for temporary or permanent data storage.

Internal storage examples include RAM, solid-state hard drives, and magnetic hard drives.

External storage devices include optical disks, USB pens, memory cards, and external hard drives.

Gaming controllers can be both input and output devices.

Modern controllers have built-in speakers and vibration feedback.

Controllers likely have their own processors for data processing.

For exams, consider controllers primarily as input devices.

It's important to understand how devices are applied in different scenarios.

Cash point systems use various input, output, and storage devices.

Card readers, keypads, buttons, and cameras are input devices in cash point systems.

Monitors, printers, speakers, and motors are output devices in cash point systems.

Cash point systems likely have internal secondary storage and main memory.

The video aims to help viewers understand the typical applications of input, output, and storage devices in computer science.

Transcripts

in this video we discuss how different

input

output and storage devices can be

applied as a solution to different

problems

[Music]

so an input device is any device

that allows you to pass information from

the outside world

into a computer system

literally hundreds of different input

devices but typical ones could be

a mouse a keyboard a microphone some

kind of barcode scanner and a webcam

an output device is there for any device

that can take data stored in a digital

form

and convert it into another format that

humans can process

for example sound wave images or

vibration feedback on a controller

again there's a vast range of different

output devices

but here's a few a visual display unit a

printer projector headphones and

speakers

a storage device is any device used for

either temporary

or permanent storage of data now these

can be internal

or external

here on the left is three examples of

internal storage

we've got main memory ram a solid state

hard drive

and a magnetic hard drive

and here's some typical examples of

external storage devices

we've got an optical disk such as a dvd

or blu-ray

we've got a usb pen a memory card

an external hard drive

now when we get down to it sometimes

things aren't quite as simple as they

seem

so here we have a gaming controller for

a typical

games console now would you consider

this an

input device or an output device

well it certainly translates your button

presses your joystick movements into

digital signals

and sends them to the console so surely

this is a device for inputting data into

a computer system

but most modern controllers also now

have built-in speakers

and provide vibration feedback now

both of these are output systems

so surely this is also an output device

the reality really

is this probably is a complete embedded

system it almost certainly will have its

own processor processing data

before it sends it off to the console

and knowing how to

interpret that data to produce output

you don't need to worry too much about

this fine level of detail for your exam

but you should consider this probably

primarily an

input device but just be aware the lines

get a bit blurry

at the end of the day as long as you

fully justify your answer in the exams

which is always a good idea you could

get away with calling this

either

so here's a list of typical input output

and storage devices

which you might be expected to know

about in the exam

now this list is far from exhaustive

there literally are thousands of these

type of devices

but this is certainly a good starting

point

what's more important though other than

simply being able to

understand and list these various

devices is knowing

how they can be applied and used

for a given situation or scenario

so here we have a cash point system

that you might find in a high street

what

input output and storage devices

might be used as part of this cash point

system

well we can quickly identify various

ways that this system is gathering

input from the real world we have the

card reader

we have a keypad we've got various

buttons either side of the screen

there's also a camera at the top for

security purposes

all of these are input devices

there's also various output mechanisms

there's some form of monitor or display

there's a printer which will produce a

receipt

a speaker to give audio feedback

and although it's not obvious there's

obviously some kind of actuator or motor

that's actually delivering you the cash

now this is considered an

output device

again you can infer that there must be

some storage devices behind this system

most likely some form of internal

secondary storage

and most likely some main memory

so having watched this video you should

be able to answer the following

key question how are input output and

storage devices used

in typical applications of computer

science

[Music]

you