Types of Computer:

• Mainframe Computer
• Mini Computer
• Servers
• Desktop Computer
• Laptop Computer
• Tablet Computer
• Mobile Phone

What is an Operating System?

An operating system consists of group of program that runs on a computer which manages the hardware and software resources of a computer. The operating system supports the computer’s basic functions, such as scheduling tasks, executing applications, and controlling different peripherals connected to computer. Following are the few examples of operating systems:

• DOS/360, MS DOS
• Microsoft Windows
• Mac OS X
• Unix
• Linux
• OS/400
• iOS
• Android
• OS/VS1, MVS, VM/370