History

The History Of Microsoft

Microsoft was formed by a Harvard College Dropout called Bill Gates. Bill Gates was born William Henry Gates III on October 28, 1955. He was born to a family that was successful in business, living a comfortable upper middle class life in Seattle, Washington.
Early in his elementary school days, Bill Gates quickly shot to the head of the class, consistently outscoring his peers in most subjects, but especially math and science. His parents soon enrolled him in Lakeside Prep School, where the atmosphere was intellectual enough to stimulate the young Gates. This move to Lakeside would prove historic, for it was here, in the spring of 1968, that he was introduced to computers.

At that time, computers were still too large and expensive for the school to purchase one of its own. Over the next ten months or so, the school struck agreements with various corporations who allowed the students to use their computers. Bill Gates, his buddy Paul Allen and a handful of others quickly took to computing. In fact, they began to skip classes, opting instead to stay in the computer room and write programs, read computer books and find out exactly how these machines worked. They soon learned to hack the system, and altered and crashed valuable files until they were banned from the computer. Soon, however, Bill and his friends were actually hired by the computer company to find bugs and explore weaknesses in the system, which kept causing the computers to crash. Instead of paying the boys for their time, they were granted something even better--unlimited computer time.

Gates has been quoted as saying that that was the time when he got into computers fulltime. "I mean, then I became hardcore. It was day and night," he said. The boys used their time eating, drinking and breathing computers. They studied manuals, explored the system, and hounded the employees with questions until they had formed a base of knowledge that would eventually lead to the formation of Microsoft.

The computer company that was hiring the group went out of business in 1970, and the boys had to find alternate sources for computer time. They were soon hired by Information Sciences Inc. to write a program for payroll. This time they actually earned money as well as enjoying the unlimited computer time. It was during this time that the group gained notoriety for their skill in computer programming. They were hired or contracted by various organizations to find bugs and fix them. Each job helped Gates and his friends learn their skill and delve ever deeper into the world of programming.

In the fall of 1973, Gates left for Harvard University. He enrolled as a prelaw student, but spent most of his time in the campus computer center, programming away. He stayed in touch with Paul Allen and they continued to talk about future projects and the possibility of one day having their very own business. Allen even moved to Boston to be closer to Gates, so they could continue working on projects. Allen continually urged Gates to quit school and work with him full-time, and Gates was unsure of what he wanted to do. This was soon to change.

One year later, Paul Allen saw the first microcomputer on the cover of a magazine. He bought the magazine and went immediately to show it to Gates. They realized the time was right. The home PC business was about to explode and someone would need to provide software for the machines. By stretching the truth somewhat, Gates arranged for a meeting with the Altair manufacturers. He had called them to let them know he had a program written for them. After the appointment was made, Gates and Allen stayed up for nights, feverishly writing the program he had promised. It worked perfectly at the meeting, and everyone was impressed. They sold the program, and saw that this was something they could do for real. Within a year, Gates had dropped out of Harvard and Microsoft was formed.

The company went through some rough first years, but eventually were able to license MS-DOS to IBM. The IBM PC took the public by storm, and its success signaled the success of Microsoft. Microsoft continued writing software, for businesses as well as the consumer market. In 1986, the company went public, and Gates became a 31-year old billionaire. The next year, the first version of Windows was introduced, and by 1993 a million copies per month were being sold.

In 1995, Gates knew that the Internet was the next area of focus, and the course of Microsoft shifted dramatically. The popular Internet Explorer browser soon became a bestseller. Today, Microsoft software is everywhere.




The History of Microsoft Operating Systems

Microsoft Windows is a family of operating systems for personal computers. In this article we look at the history of Microsoft operating systems from 1985 to present day.

Microsoft Windows is a family of operating systems for personal computers. Windows dominates the personal computer world, running, by some estimates, on more than 90 percent of all personal computers – the remainder running Linux and Mac operating systems. Windows provides a graphical user interface (GUI), virtual memory management, multitasking, and support for many peripheral devices.

Microsoft Operating Systems for Personal Computers
The following details the history of Microsoft operating systems designed for personal computers (PCs).
Key definitions to know: operating system, computer, Microsoft, Microsoft Windows.

MS-DOS (Microsoft disk operating system)
Originally developed by Microsoft for IBM, MS-DOS was the standard operating system for IBM-compatible personal computers. The initial versions of DOS were very simple and resembled another operating system called CP/M. Subsequent versions have become increasingly sophisticated as they incorporated features of minicomputer operating systems.

Windows 1.0 – 2.0 (1985-1992)
Introduced in 1985, Microsoft Windows 1.0 was named due to the computing boxes, or "windows" that represented a fundamental aspect of the operating system. Instead of typing MS-DOS commands, windows 1.0 allowed users to point and click to access the windows.

In 1987 Microsoft released Windows 2.0, which was designed for the designed for the Intel 286 processor. This version added desktop icons, keyboard shortcuts and improved graphics support.

Windows 3.0 – 3.1 (1990–1994)
Microsoft released Windows 3.0 in May, 1900 offering better icons, performance and advanced graphics with 16 colors designed for Intel 386 processors. This version is the first release that provides the standard "look and feel" of Microsoft Windows for many years to come. Windows 3.0 included Program Manager, File Manager and Print Manager and games (Hearts, Minesweeper and Solitaire). Microsoft released Windows 3.1 in 1992.

Windows 95 (August 1995)
A major release of the Microsoft Windows operating system released in 1995. Windows 95 represents a significant advance over its precursor, Windows 3.1. In addition to sporting a new user interface, Windows 95 also includes a number of important internal improvements. Perhaps most important, it supports 32-bit applications, which means that applications written specifically for this operating system should run much faster.

Although Windows 95 can run older Windows and DOS applications, it has essentially removed DOS as the underlying platform. This has meant removal of many of the old DOS limitations, such as 640K of main memory and 8-character filenames. Other important features in this operating system are the ability to automatically detect and configure installed hardware (plug and play).

Windows 98 (June 1998)
Windows 98 offers support for a number of new technologies, including FAT32, AGP, MMX, USB, DVD, and ACPI. Its most visible feature, though, is the Active Desktop, which integrates the Web browser (Internet Explorer) with the operating system. From the user's point of view, there is no difference between accessing a document residing locally on the user's hard disk or on a Web server halfway around the world.

Windows ME - Millennium Edition (September 2000)
The Windows Millennium Edition, called "Windows Me" was an update to the Windows 98 core and included some features of the Windows 2000 operating system. This version also removed the "boot in DOS" option.

Windows NT 31. - 4.0 (1993-1996)
A version of the Windows operating system. Windows NT (New Technology) is a 32-bit operating system that supports preemptive multitasking. There are actually two versions of Windows NT: Windows NT Server, designed to act as a server in networks, and Windows NT Workstation for stand-alone or client workstations.

Windows 2000 (February 2000)
Often abbreviated as "W2K," Windows 2000 is an operating system for business desktop and laptop systems to run software applications, connect to Internet and intranet sites, and access files, printers, and network resources. Microsoft released four versions of Windows 2000: Professional (for business desktop and laptop systems), Server (both a Web server and an office server), Advanced Server (for line-of-business applications) and Datacenter Server (for high-traffic computer networks).

Windows XP (October 2001)
Windows XP was first introduced in 2001. Along with a redesigned look and feel to the user interface, the new operating system is built on the Windows 2000 kernel, giving the user a more stable and reliable environment than previous versions of Windows. Windows XP comes in two versions, Home and Professional. Microsoft focused on mobility for both editions, including plug and play features for connecting to wireless networks. The operating system also utilizes the 802.11x wireless security standard. Windows XP is one of Microsoft's best-selling products.

Windows Vista (November 2006)
Windows Vista offered an advancement in reliability, security, ease of deployment, performance and manageability over Windows XP. New in this version was capabilities to detect hardware problems before they occur, security features to protect against the latest generation of threats, faster start-up time and low power consumption of the new sleep state. In many cases, Windows Vista is noticeably more responsive than Windows XP on identical hardware. Windows Vista simplifies and centralizes desktop configuration management, reducing the cost of keeping systems updated.

Windows 7 (October, 2009)
Windows 7 made its official debut to the public on October 22, 2009 as the latest in the 25-year-old line of Microsoft Windows operating systems and as the successor to Windows Vista (which itself had followed Windows XP). Windows 7 was released in conjunction with Windows Server 2008 R2, Windows 7's server counterpart. Enhancements and new features in Windows 7 include multi-touch support, Internet Explorer 8, improved performance and start-up time, Aero Snap, Aero Shake, support for virtual hard disks, a new and improved Windows Media Center, and improved security.

Windows 8 (Codename, Expected Release 2012)
Windows 8 is a completely redesigned operating system that's been developed from the ground up with touchscreen use in mind as well as near-instant-on capabilities that enable a Windows 8 PC to load and start up in a matter of seconds rather than in minutes. Windows 8 will replace the more traditional Microsoft Windows OS look and feel with a new "Metro" design system interface that first debuted in the Windows Phone 7 mobile operating system. The Metro user interface primarily consists of a "Start screen" made up of "Live Tiles," which are links to applications and features that are dynamic and update in real time. Windows 8 supports both x86 PCs and ARM processors. Online media sites indicate that this version will be available in 2012, with October and Fall being the most often quoted time frame.

Microsoft Operating Systems for Servers and Mobile Devices
Aside from operating systems designed for use on personal computers (PCs) and laptops, Microsoft has also developed operating systems for services, handheld devices, and mobile phones.

Key definitions to know: server, mobile operating system, handheld device, Microsoft.

Windows Server (March 2003)
Windows Server is a series of Microsoft server operating systems. Windows servers are more powerful versions of their desktop operating system counterparts and are designed to more efficiently handle corporate networking, Internet/intranet hosting, databases, enterprise-scale messaging and similar functions. The Windows Server name made its debut with the release of Windows Server 2003 and continues with the current release, Windows Server 2008 R2, which shares its codebase with Windows 7. Windows Server 2008 R2 debuted in October 2009.

Windows Home Server ( January 2007)
Announced in January 2007, Windows Home Server (WHS) is a "consumer server" designed to use with multiple computers connected in the home. Home Server allows you to share files such as digital photos and media files, and also allows you to automatically backup your home networked computers. Through Windows Media Connect, Windows Home Server lets you share any media located on your WHS with compatible devices.

Windows CE (November 2006)
A version of the Windows operating system designed for small devices such as personal digital assistants (PDAs) (or Handheld PCs in the Microsoft vernacular). The Windows CE graphical user interface (GUI) is very similar to Windows 95 so devices running Windows CE should be easy to operate for anyone familiar with Windows 95.

Windows Mobile (April 2000)
A mobile operating system for smartphones and mobile devices from Microsoft based on the Windows CE kernel and designed to look and operate similar to desktop versions of Microsoft Windows. Windows Mobile has largely been supplanted by Windows Phone 7, although Microsoft did release, in 2011, Windows Embedded Handheld 6.5, a mobile OS compatible with Windows Mobile 6.5 that's designed for enterprise mobile and handheld computing devices.

Windows Phone (November 2010)
A mobile operating system for smartphones and mobile devices that serves as the successor to Microsoft's initial mobile OS platform system, Windows Mobile. Unlike Windows Mobile, Windows Phone 7 (also referred to as WinPhone7) is targeted more to the consumer market than the enterprise market, and it replaces the more traditional Microsoft Windows OS look and feel with a new "Metro" design system user interface. Windows Phone 7 features a multi-tab Internet Explorer Mobile Web browser that uses a rendering engine based on Internet Explorer 9 as well Microsoft Office Mobile, a version of Microsoft Office that’s tailored for mobile devices.




How Operating Systems Work

When you turn on your computer, it's nice to think that you're in control. There's the trusty computer mouse, which you can move anywhere on the screen, summoning up your music library or Internet browser at the slightest whim. Although it's easy to feel like a director in front of your desktop or laptop there's a lot going on inside, and the real man behind the curtain handling the necessary tasks is the operating system.

­Most desktop or laptop PCs come pre-loaded with Microsoft Windows. Macintosh computers come pre-loaded with Mac OS X. Many corporate servers use the Linux or UNIX operating systems. The operating system (OS) is the first thing loaded onto the computer -- without the operating system, a computer is useless.

­­­More recently, operating systems have started to pop up in smaller computers as well. If you like to tinker with electronic devices, you're probably pleased that operating systems can now be found on many of the devices we use every day, from cell phones to wireless access points. The computers used in these little devices have gotten so powerful that they can now actually run an operating system and applications. The computer in a typical modern cell phone is now more powerful than a desktop computer from 20 years ago, so this progression makes sense and is a natural development.

The purpose of an operating system is to organize and control hardware and software so that the device it lives in behaves in a flexible but predictable way. In this article, we'll tell you what a piece of software must do to be called an operating system, show you how the operating system in your desktop computer works and give you some examples of how to take control of the other operating systems around you.




Operating System Functions

At the simplest level, an operating system does two things:

It manages the hardware and software resources of the system. In a desktop computer, these resources include such things as the processor, memory, disk space and more (On a cell phone,they include the keypad, the screen, the address book, the phone dialer, the battery and the network connection).

It provides a stable, consistent way for applications to deal with the hardware without having to know all the details of the hardware.

The first task, managing the hardware and software resources, is very important, as various programs and input methods compete for the attention of the central processing unit (CPU) and demand memory, storage and input/output (I/O) bandwidth for their own purposes. In this capacity, the operating system plays the role of the good parent, making sure that each application gets the necessary resources while playing nicely with all the other applications, as well as husbanding the limited capacity of the system to the greatest good of all the users and applications.

­ The second task, providing a consistent application interface, is especially important if there is to be more than one of a particular type of computer using the operating system, or if the hardware making up the computer is ever open to change. A consistent application program interface (API) allows a software developer to write an application on one computer and have a high level of confidence that it will run on another computer of the same type, even if the amount of memory or the quantity of storage is different on the two machines.

Even if a particular computer is unique, an operating system can ensure that applications continue to run when hardware upgrades and updates occur. This is because the operating system -- not the application -- is charged with managing the hardware and the distribution of its resources. One of the challenges facing developers is keeping their operating systems flexible enough to run hardware from the thousands of vendors manufacturing computer equipment. Today's systems can accommodate thousands of different printers, disk drives and special peripherals in any possible combination.




Types of Operating Systems
Within the broad family of operating systems, there are generally four types, categorized based on the types of computers they control and the sort of applications they support. The categories are:

Real-time operating system (RTOS) - Real-time operating systems are used to control machinery, scientific instruments and industrial systems. An RTOS typically has very little user-interface capability, and no end-user utilities, since the system will be a "sealed box" when delivered for use. A very important part of an RTOS is managing the resources of the computer so that a particular operation executes in precisely the same amount of time, every time it occurs. In a complex machine, having a part move more quickly just because system resources are available may be just as catastrophic as having it not move at all because the system is busy.

Single-user, single task - As the name implies, this operating system is designed to manage the computer so that one user can effectively do one thing at a time. The Palm OS for Palm handheld computers is a good example of a modern single-user, single-task operating system.

Single-user, multi-tasking - This is the type of operating system most people use on their desktop and laptop computers today. Microsoft's Windows and Apple's MacOS platforms are both examples of operating systems that will let a single user have several programs in operation at the same time. For example, it's entirely possible for a Windows user to be writing a note in a word processor while downloading a file from the Internet while printing the text of an e-mail message.

Multi-user - A multi-user operating system allows many different users to take advantage of the computer's resources simultaneously. The operating system must make sure that the requirements of the various users are balanced, and that each of the programs they are using has sufficient and separate resources so that a problem with one user doesn't affect the entire community of users. Unix, VMS and mainframe operating systems, such as MVS, are examples of multi-user operating systems.

It's important to differentiate between multi-user operating systems and single-user operating systems that support networking. Windows 2000 and Novell Netware can each support hundreds or thousands of networked users, but the operating systems themselves aren't true multi-user operating systems. The system administrator is the only "user" for Windows 2000 or Netware. The network support and all of the remote user logins the network enables are, in the overall plan of the operating system, a program being run by the administrative user.

With the different types of operating systems in mind, it's time to look at the basic functions provided by an operating system.