Different Types of Computer Systems

PC

PC: A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations 

Laptop

Laptop, a laptop is a compact computer; it is a smaller version with all the same equipment as a computer. A laptop is just a portable computer.

Net book

Net book, A net book is basically the same as a laptop but smaller again it has all the same equipment as a computer and a laptop.

PDA

A PDA (Personal Digital Assistant) is a computer that fits in one’s hand. These small computers are sometimes called palmtops and are a great way to store telephone numbers and email addresses, access the Internet, make calculations, keep a digital calendar, and play games

Mobile Phone

Mobile phone Mobile phones connect to a wireless communications network through radio wave or satellite transmissions. Most mobile phones provide voice communications, Short Message Service (SMS), Multimedia Message Service (MMS), and newer phones may also provide Internet services such as Web browsing and e-mail.

Games Console

A games console is an interactive entertainment computer or modified computer system that produces a video display signal which can be used with a display device (a television) to display a video game.

Tablet

It's a flat-panel portable PC in the form of a slate. A user inputs data either by tapping the screen with a stylus, or using the stylus to write directly on to the screen. The tablet PC can wirelessly connect to the Internet and other PCs and is intended to provide the power of a notebook in hand-held form.

Server

A server is a bigger version of the computer hard drive. This is every website in the world is stored, every big origination has a sever. If the server crashes or stops for some reason this means that no one would be able to access the website.

Embedded devices

A embedded device is a electronic computer that has input, output and process. It sometimes also has storage. Examples are ABS, Washing machines and Mobile phones

Data Flow diagram

Devices for Network Connection

Bluetooth 

It’s to transfer data or files like ring tones etc...from phones.
Also Bluetooth is to use a head set when driving. some cell phones have a Bluetooth but just for head set purposes.Bluetooth is a technology that allows for short distance wireless data transmission. It is used most commonly in phones for peripheral devices like headsets

Network Interface Cards

A network interface card (NIC) is a computer circuit board or card that is installed in a computer so that it can be connected to a network. Personal computers and workstations on a local area network (LAN) typically contain a network interface card specifically designed for the LAN transmission technology.

3G/4G

3G (3rd Generation) is a family of standards for mobile telecommunications including wide-area wireless voice telephone, video calls, and wireless data, all in a mobile environment.
3G or 3rd generation mobile telecommunications is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union. Application services include wide-area wireless voice telephone, mobile Internet access, video calls and mobile TV, all in a mobile environment.

 4G is a technology that will transform wireless communications in a completely new way. It is also known as “beyond 3G," since it provides a comprehensive and secure IP (Internet Protocol) solution.

In telecommunications, 4G is the fourth generation of cell phone mobile communications standards. It is a successor of the third generation (3G) standards. A 4G system provides mobile ultra-broadband Internet access, for example to laptops with USB wireless modems, to Smartphone’s, and to other mobile devices

Output Devices

Output Devices

In this blog i am going to tell you about the output devices, output divices are the things that let you what is on the screen.

Speakers

 The speakers are a output device that can play music or an other sound out of them.

Computer Monitor

 A computer monitor is an electronic device that shows pictures. A monitor is usually used to see programs on a computer.

Projector

 A Projector is a device designed to take an image from a video source and project it as faithfully as possible onto a screen or other surface.

Printer

A printer is a machine used by computers to print out documents on paper in order to have a physical copy of text documents, diagrams or photos.

Input Devices

There are so many input devices and I am going to tell you about some of the main ones:

The mouse

     A device that controls the movement of the cursor or pointer on a display screen. A mouse is a small object you can roll along a hard, flat surface. Its name is derived from its shape.

The keyboard

Modern computer keyboards were modelled after, and are still very similar to, classic typewriter keyboards. Many different layouts are available around the world but most keyboards are of the QWERTY type.

Web-Cam

 A webcam is a video camera which feeds its images in real time to a computer or computer network, often via USB

Scanner

A scanner is a piece of equipment that lets you import a piece of paper on to your computer screen.

Joystick/Games Controller

 A joystick is an input device that allows you to play games on the computer, or any console that needs one. Mostly joysticks these days are used for flight simulators

Hardware

Processor

 This is  your computers brain. The processor tells your computer what to do and when to do it, it decides which tasks are more important and prioritizes them to your computers needs

The speed is measured in Megahertz or MHz's a single MHz is a calculation of 1 million cycles per second.

Memory



Memory is a device that stores all the work you do on your computer. The memory on the computer saves every piece of work. The computer comes with so much memory but that can run out but when it does it is so easy to buy more.

ROM

ROM  is were you store your own work the you completed. Even after you turn off your computer, the contents of ROM will remain.

RAM

RAM  is were the computer stores the information the computer needs such as the instructions how to work the computer etc.

Storage Devices

CD Rom

It is an optical disk that has the capacity to store data, music files, video files etc.

A DVD

is an optical disc storage media format that can be used for data storage, including movies.

Flash drives and memory sticks.

A flash drive is a small storage device that can be used to transport files from one computer to another.

 Memory sticks are handy devices that can be used to copy and store data from computer hard drives.

Hard disk drive

The hard disk drive is the main, and usually largest, data storage device in a computer. The operating system, software titles and most other files are stored in the hard disk drive.