| OS | Developer | Date of Release |
| mac OS | Apple | 2001 |
| Android | 2008 – present | |
| MS-DOS | Microsoft | 1981 |
| Windows 1.0 | Microsoft | November 1985 |
| Windows 2.03 | Microsoft | December 1987 |
| Windows 98 | Microsoft | June 1998 |
| NetWare | NetWare 6.5SP8 2010, Production Closed | 1983 |
| Firefox OS | Mozilla | 2013 |
| Unix | Bell Labs | 1969 |
Types of OS
There are many types of OS available for the users. Some of these are as follows:
- Batch OS: In a batch OS the users don’t feed the input directly into the computer. In other words, the users don’t directly interact with the OS. They upload their data onto an offline device like a punch card and then this device interacts with the OS. This is one of the most primitive kinds of the OS.
- Single User OS: These operating systems are intended to be used on a personal computer. That is an OS that is designed in a way that it can handle one computer or one user only is known as the single user OS>
- Multiple User OS: This kind of OS is used to control many devices at the same time. It has man terminals or points from where different users can interact with it at a given time.
- GUI based: GUI means the Graphics User Interface based. In these OS, the user interacts with the OS through a graphical interface that can be understood easily. Examples are the Windows, Mac and Android OS.
Booting
When a computer starts, the OS has to be loaded first because it has to control all the other functions of hardware and software of the computer. This process is called booting. During booting the OS loads all the hardware and software applications that are preinstalled in the memory of the computer.
Now let us see some questions that may be asked in this section of computer awareness.
Q 1: _________________ allocates memory and other resources in a computer.
A) CPU B) ALU C) OS D) RAM
Answer: If you read what was written above, you wouldn’t hesitate to answer this question as C) Operating System.
Q 2: Pick the odd word out of the following:
A) DOS B) OS C) S D) Mac
Answer: DOS, Mac, and OS represent the same thing. Thus the correct option here is C) S.
Practice Questions
Q 1: Pick the odd word out:
A) Software B) Hardware C) CPU D) Netware
Ans: D) Netware
Q 2: In the following question, pick the choice that will fill the gap perfectly:
Firefox: Mozilla, Mac: Apple, Windows: Microsoft , _______
A) Unix: Bell Labs B) Android: Netware C) Windows: Vista D) Mac: safari
Ans: A) Unix: Bell Labs
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