An analog computer is a form of computer that uses the continuously-changeable aspects of physical phenomena such as electrical, [l] mechanical, or hydraulic quantities to model the problem being solved. In contrast, digital computer represent varying quantities incrementally, as their numerical values change
A digital computer is machine that stores data in a numerical format and performs operations on that data using mathematical manipulation.This type of computer typically includes some sort of device to store information, some method for input and output of data, and components that allow mathematical operations to be performed on stored data. Digital computer are almost always electronic but do not necessarily need to be so.
A hybrid computer is a type of computer that is designed to provide the features and functions that are found by both the digital and the analog computers. A hybrid computer system offers a much cost effective method that is used to perform complex simulations.
Classification of computers:
When most people hear the word “computer,” they think of a personal computer such as a desktop or laptop computer. However, computers come in many shapes and sizes, and they perform many different functions in our daily lives. When you withdraw cash from an ATM, scan groceries at the store, or use a calcuator, you’re using a type of computer.
Many people use desktop computer at work, home, school, or library.They can be small, medium or large in style and they usually sit on a desk. Once you add a monitor, mouse, and keyboard, you have what is typically Known as a desktop computer.
Most desktop computer are easy to upgrade and expand or add new parts. Another benefit of desktop computer is the cost. If you compare a desktop and a laptop with the same feature, you will most likely find that the desktop computer is priced lower.
Some desktop computers have a built-in monitor to save space. These are often called all-in-one desktop computers.
The second type of computer you may be familiar with is a laptop computer, or a laptop. Laptops are battery-or AC-powered personal computers that are more portable than desktop computers, allowing you to use them almost anywhere.
Because a laptop is smaller than a desktop, It’s more difficult to access its internal components This means you may not be able to upgrade them as easily as a desktop. However, It’s usually possible to add more RAM or a larger hard drive.
A laptop computer is sometimes called a notebook computer because of its size.
A servers is a computer that serves up information to other computer on a network. Many businesses have file servers that employees can use to store and share files. A server can look like a regular desktop computer, or it can be much larger.
Server also play an important role in making the Internet work. They are where webpages are stored. When you use your browser to click a link, a web server delivers the page you requested.
A microcomputer is a small, relatively inexpensive computer with a microprocessor as its central processing unit (CPU).
A microprocessor incorporates the functions of a computer’s central processing unit (CPU) on a single integrated circuit (IC), or at most a few integrated circuits.
A Minicomputer is a digital computer of medium power, more powerful than microcomputer but less than a mainframe. Minicomputers are mostly used for general businesses application and by large enterprises in department level operations.
Main Frame Computer:
Mainframe computers (colloquially referred to as “big iron”) are computer used primarily by corporate and governmental organizations for critical applications.
TYPES OF COMPUTERS