Along with the development of operating system, more and more services become common core services. Now, an OS may need to provide network services and Internet connectivity, which used to not be a common core services. Operating systems also need to keep the damage to computer systems from interference destructive programs from other computers, such as viruses. List of common core services will continue to grow.

Programs communicate with each other with Application Programming Interface, Application Programming Interface, or shortened by the API. With this API application program can communicate with the Operating System. As humans communicate with computers through a user interface, the program also communicate with other programs through the API.

However the API does not affect a computer full of programs that run on the platform operation. For example if the program made for Windows 3.1 when running on Windows 95 and later generations will see a striking difference between the program window with the other programs.
Operating systems currently

Operating system, the main operating system used by the general system of computers (including PCs, personal computers) is divided into 3 major groups:
Family Microsoft Windows – which among others consists of the Windows Desktop Environment (version 1.x to version 3.x), Windows 9x (Windows 95, 98, and Windows ME), and Windows NT (Windows NT 3.x, Windows NT 4.0 , Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7 (Seven) which will be released in the year 2009, and Windows Orient which will be released in the year 2014)).
Unix family of operating systems using the POSIX interface, such as SCO UNIX, family BSD (Berkeley Software Distribution), GNU / Linux, MacOS / X (based on a modified BSD kernel, and known by the name of Darwin) and GNU / Hurd.
Mac OS, the operating system for Apple computers output is commonly called a Mac or Macintosh. The latest operating system is Mac OS X version 10.4 (Tiger). Beginning in 2007 planned launch of version 10.5 (Leopard).
Meanwhile, Mainframe computers, and Super computers using many different operating systems are different, usually a derivative of the UNIX operating system developed by vendors such as IBM AIX, HP / UX, etc..

Related posts:

1. History of Computer Operating System
2. The history and development of Microsoft Windows
3. Mechanisms and parts of the operating system process
4. The function and status in computer processors
5. The history and development of Linux
6. Historical development, applications and types of UNIX
7. Computer Support Services

1 Comment

1.   MacBook Laptop Battery   |  Wednesday, 05 May 2010 at 4:20 pm

   Spectacular work! Those guys at your competition (you know who) don’t even have a clue! Keep it up! I have a Laptop Battery Commentary site of my own at Buy-Batteries.com … I will place a link back to your site. Regards!