How many types of Computers ? | how many types of personal computer ?

 Types of Computers

Analog 

The analog computers are computer systems that measure variations in quantities suchas temperature, voltage, speed, etc. Analog computers are known to measure the data that varies continuously.

Digital

Digital computers are the computer systems that count things by manipulation of certain discontinuous numbers and letters through representation of binary digits (also called bits) in contrast to analog computers that measures the variations in quantities). 

Hybrid

Hybrid computers as the name suggests are a good mix of analog as well as digital computers, using an analog computer front-end, which is then fed into a digital computer’s repetitive process. Hybrid computers are used for scientific calculations,in defence sector. 

Based on purpose 

General Purpose .These computers are designed to work on different types of applications. In these types of computers the programs are not stored permanently rather programs are input at the time of their execution. Personal computers, including desktops, notebooks, smart phones and tablets, are all examples of general-purpose computers. 

Special Purpose Special-Purpose computers are task specific computers and are designed to solve a particular problem. They are also known as dedicated computers, because these computers are dedicated to perform a single particular task repetitively. Automated Teller Machines are perfect example of this. ATMs are used for a specific task and they were programmed to do that only. 

Based on Memory Size and Performance

 Super Computer:

They are focused on performing specific actions and follow heavy extremely intense and critical calculations like weather forecasting, fluid dynamics etc. They are generally used by scientists and are very powerful and expensive. The speed with which they operate is highly blazing.

 Mainframe Computer: 

They are the typical large computing machines which occupied extremely large space, more than the size of the rooms today. They were capable of operating multiple usersvia single interface and typically operated more than million instructions per second. 

Mini Computer: 

They are the intermediate solutions between Mainframe computers and Micro Computers. And they are also known as mid-range computers.

 Micro Computer: 

Microcomputers came into picture as computer shaving single chip micro processors. They are the most common computers being used for domestic / commercial purposes now a days. They also include solutions like Desktop Computers, Game Consoles, Tablet Computers, and Smart Phones etc. They are basically portable and carry veryless space. 

Types of Personal Computers 

Tower model: This model of personal computer refers to a computer in which the power supply, motherboard, and other mass storage devices are stacked on top of each other in a cabinet.

Desktop 

 Desktop model means computer that are designed to fit comfortably on top of a desk, with the monitor sitting on top of the computer.

Notebook computer Also called ultra book. These are extremely popular because they are extremely lightweight and portable.

Laptop 

Laptop are now a days also called notebook computers .These are small and portable .You can make them sit on your lap and work on them. 

Hand-held computer

These computers are portable enough to be carried in one’s hand. 

Palmtop 

These computers as the name suggest fit in your palm. Due to extremely small size their use is limited to phone books and calendars . PDAPDA’s have electronic pens rather than keyboards for inputs unlike laptop. They also incorporate handwriting recognition features. and voice recognition technologies i.e cana lso react to voice input.

Smart phones

Smart phones are cellular phones that function both as a phone and a small pc. Uses of Computers In the Field of Education Making classrooms effective Providing online education Helps in research Work In the Field of Office

Document Management system : Document Management system consists of different applications likeword processing, desktop publishing, spreadsheets etc. • Word Processing• Desktop Publishing • 

Spreadsheet Application Office Support System : 

It is used to coordinate and manage the activities of a workgroup. The members of a workgroup can share their work and coordinate with one another. In the Field of Medicine • Hospital Administration• Recording Medical History • Monitoring systems• Life Support System • Diagnosis of Diseases In the Field of Defence •

 Computers are used to track incoming missiles• Computers are used in helping the military find out where all their assets are (SituationalAwareness) • Computers are used in tanks and planes and ships to target enemy forces. There are many more uses of computers are there.