Classification Of Digital Computer

The digital computers that are available now a days vary in their sizes and types.These digital computers are broadly classified into four categories based on their size and type.

• Micro Computer
• Mini Computer
• Mainframe Computer
• Super Computer

Micro Computer:
Micro Computer are small low cast and single user digital computers.It is a device with microprocessor,Input unit ,storage unit and CPU(Central Processing Unit).
Microcomputer Computer formerly a commonly used term for Personal Computers particularly any of class of any small digital computers.Its CPU contained on a single integrated semi conductor chip.
IBM PC based on Pentium microprocessor and Apple Macintosh are some Examples of microcomputers. Microcomputers include desktop computers, notebook computers or laptop,tablet compute, handheld computer,smartphones and notebook. 

Types of Micro Computers:  

A)Desktop Computer or Personal Computer(PC):-It is the most type of microcomputer.A desktop computer is a personal computer designed for regular use at a single location on or near a desk or table due to its size and power requirements.It is not very expensive and is suited t the needs of a single user at home,small business units,and organization.
Examples:Apple,Microsoft,Dell,and Lenovo ,Sony,HP,etc are some of the PC manufactures.

B)Notebook Computers or Laptop:-A laptop is a small, portable computer and have all the features of a desktop computer. The advantage of the laptop is that it is small in size, so it can be carried anywhere. Notebook computers use a variety of techniques, known as flat-panel technologies, to produce a lightweight and non-bulky display screen. Laptops Computers are costlier than the desktop computers.

C)Netbook:-These are smaller notebooks optimized for low weight and low cost, and are designed for accessing web-based applications.Netbooks deliver the performance needed to enjoy popular activities like streaming videos ort music,e-mailing,web surfing or instant messaging.

           

D)Tablet:- A tablet is a wireless, portable personal computer with a touchscreen interface. The tablet form factor is typically smaller than a notebook computer, but larger than a smartphone.

E)Handheld Computer or Personal Digital Assistant(PDA):-It is a small computer that can be heald on the top of the palm.It is small in size.PDA uses a pen or a stylus for input,instead of the keyboard.They have a limited memory and are less porful.PDAs can be connected to the internet via wireless connnection.

F)Smart Phones:A smartphone is a mobile phone with highly advanced features. A typical smartphone has a high-resolution touch screen display, WiFi connectivity, Web browsing capabilities, and the ability to accept sophisticated applications. The majority of these devices run on any of these popular mobile operating systems: Android, Symbian, iOS, BlackBerry OS and Windows Mobile.

Mini Computer:

These perform multi-tasking and allow terminals to be connected to their services.the ability to connect minicomputers to each other and mainframes has popularized them among larger businesses.This use is being challenged by the development in the microcomputer range and the practice of starting resources of microcomputer under a network.Minicomputer are still recognized as being able to process large amounts of data.

Types of minicomputer

The types of minicomputer are- tablet PC, Desktop minicomputers, cell phones, notebooks, high-end mP3 players, etc.

Examples:- IBM's AS/400e

Mainframe Computer:

Main frame computers generally require special attention and are kept in a controlled atmosphere.They are multi-tasking and generally used in areas where large database are maintained example as government agency or airline industry.

Examples:- IBM LinuxONE

Super Computer:

Super Computers operate very fast and have multiple processors. Ther are very few of these machines in existence due to their cost.

This type of computer has been developed for scientific applications usually involving complex arithmetic and mathematical operations. One such use is in weather forecasting.

A supercomputer is a type of computer that has the architecture, resources and components to achieve massive computing power. Although advances like multi-core processors and GPGPUs (general-purpose graphics processing units) have enabled powerful machines for personal use (see: desktop supercomputer, GPU supercomputer), by definition, a supercomputer is exceptional in terms of performance.

China has owned the fastest supercomputer in the world. “Fast” is defined by the number of petaflops the computer system can perform. A petaflop is one thousand teraflops, or one quadrillion floating point operations per second.

Year	Supercomputer	Peak speed	Location
2016	Sunway TaihuLight	93.01 PFLOPS	Wuxi, China
2013	NUDT Tianhe-2	33.86 PFLOPS	Guangzhou, China
2012	Cray Titan	17.59 PFLOPS	Oak Ridge, U.S.
2012	IBM Sequoia	17.17 PFLOPS	Livermore, U.S.
2011	Fujitsu K computer	10.51 PFLOPS	Kobe, Japan