Types of Computer

                                                              TYPES OF COMPUTER
                                                                    

There are three different types of computers according to the principles of operation. Those three types of computers are
Computer:

1. Analog computers
2.  Digital computers
3.  Hybrid computers                                        

1. Analog computers:
             Analog Computer is a computing device that works on continuous range of values. The results given by the analog computers will only be approximate since they deal with quantities that vary continuously. It generally deals with physical variables such as voltage, pressure, temperature, speed, etc.
2.Digital computer:
             With these types of computers operation are on electrical input that can attain two inputs, states of ON=1 and state of OFF = 0. With digital type of computers data is represented by digital of 0 and 1 or off state and on state. Digital computer type recognizes data by counting discrete signal of (0 0r 1), they are high speed programmable; they compute values and stores results. After looking at the Digital computer type and how it functions will move to the third computer type as mentioned above.
3.Hybrid computers:
                A hybrid computer combines the desirable features of analog and digital computers. It is mostly used for automatic operations of complicated physical processes and machines. Now-a-days analog-to-digital and digital-to-analog converters are used for transforming the data into suitable form for either type of computation.
Digital computer:

1. mini computer
2. micro computer
3. super computer

                                                        Mini computers

Deskktop computers: A desktop computer is a personal computer (PC) in a form intended for regular use at a single location, as opposed to a mobile laptop or portable computer. Early desktop computers are designed to lay flat on the desk, while modern towers stand upright. Most modern desktop computers have separate screens and keyboards.

Laptop:

         Portable and compact personal computer with the same capabilities as a desktop computer. Laptop computers have an L-shape design and the screen can be lowered and closed to allow for easy transportation of the machine. The primary feature that attracts users to laptops over desktops is their portability. Laptop computers provide users the ability to run the machine using an internal battery or an outside power adaptor. Laptops have dramatically decreased in size since their introduction in 1979. Laptops are usually more expensive than standard desktops and do not have the same life-span as fixed personal computers.


Notebook:
     A notebook computer is a battery- or AC-powered personal computer generally smaller than a briefcase that can easily be transported and conveniently used in temporary spaces such as on airplanes, in libraries, temporary offices, and at meetings.









Netbook:
               Netbook computers are small portable computers with limited capabilities as compared to standard PC notebooks. Their small size and low weight allows them to be easily transported. However, their limited capabilities on storage and computing power restrict the user to certain applications and functions.




    

Personal digital assistant(PDA):Powerful handheld computing device without a keyboard, but with a screen that reads the words written (drawn) on it with a pen -like stylus. Most PDAs (like the Palm Pilot) have built-in (or accessible through attachable modules) capabilities to take notes, write letters, keep records, perform spreadsheetfunctions, read bar codes, connect to internet and other networks to download and upload data, and synchronize its data with data in a desktop computer. Wireless PDAs can connect to remote computers or databases within the range.



IPAD:

               The iPad is a tablet computer developed by Apple. It is smaller than a typical laptop, but significantly larger than the average smartphone. The iPad does not include a keyboard or a trackpad, but instead has a touchscreen interface, which is used to control the device.