Software Components PC software components depend upon the Operating System (OS) installed. The OS is a set of programs coordinating all work activity in the PC. Without it and other software, the PC does nothing but heat the room. The most common PC operating systems are: • DOS—The original PC operating system is used to set up and sometimes to troubleshoot PCs. DOS makes the functionality of the computer hardware accessible for running the Windows setup. DOS is the basic set of computer instructions that manages the flow of information in the PC.

• Windows —There are several major iterations of Windows: Windows 3. Folder Size Professional Full Cracked on this page. x, Windows 95, Windows 98, and Windows Millennium Edition (Me). Windows Me is the operating system that was delivered with most new PCs. It provides a graphical user interface (GUI) and multitasking capabilities. A version of Windows XP is now filling that role. • Windows NT —This is the network server and industrial strength operating system for PCs.

The main components of a computer hardware system are: input; processing; output. Input devices include the keyboard, mouse, microphone, cameras and scanners, joysticks and to uch-screens. Processing devices include the CPU (central processing unit), GPU (graphic processing unit) and APU (audio processing unit). The main components of a computer hardware system are: input; processing; output. Input devices include the keyboard, mouse, microphone, cameras and scanners, joysticks and to uch-screens. Processing devices include the CPU (central processing unit), GPU (graphic processing unit) and APU (audio processing unit). Mar 30, 2012 3 hardware componentts commonly installed on a desktop computer? Installed vista on my desktop computer. Hardware if two Os are installed on a 3.

It provides a GUI similar to Windows 9x. Windows NT is a more robust operating system than Windows with better isolation of DOS, Windows, and Windows NT applications from each other.

This makes for a more reliable operating environment. • Windows 2000 —This is the operating system that has evolved from Windows NT.

The user interface is virtually identical to Windows Me. Kurznotizen Windows 7 there. Underneath the user interface is an improved Windows operating system based upon the same core technology used in Windows NT servers.

Windows 2000 supports a variety of CPU chips (Windows Me runs only on Pentium and Pentium-compatible CPU chips), runs on two CPUs simultaneously, and supports plug-and-play hardware components. In the long term, variations of Windows 2000, soon to be called Windows XP, will become the Microsoft operating system delivered with all Windows PCs. There are server and workstation versions of Windows 2000. The workstation version of Windows 2000 is called Windows 2000 Professional. Each operating system has several major components. DOS DOS is not a knowledge objective of the current A+ certification.

However, DOS is still an important operating system because hardware diagnostic and configuration programs use it. For example, a DOS program in most cases performs updating a PC BIOS by flashing NVRAM. Further, DOS commands are implemented in all Windows operating systems.

The PC DOS components are: • COMMAND.COM—This is the command interpreter for DOS. Commands typed on the keyboard at the DOS user command prompt are processed first by COMMAND.COM. It interprets the command and initiates the other software activities to complete the command. COMMAND.COM interfaces to MSDOS.COM through the DOS Application Programming Interface (API). • MSDOS.SYS—This performs the tasks and schedules the programs required to accomplish the DOS commands. This component is the heart and hands of DOS. • IO.SYS—This DOS component handles the detailed I/O activities of DOS.

It interfaces to device driver programs that perform the most detailed hardware operation and control activities. IO.SYS works in conjunction with device driver software for standard and special PC hardware. • Device drivers—Device drivers tell DOS how to interface properly with an external device and are specified by DEVICE= statements in CONFIG.SYS.

Some DOS device drivers are: • SMARTDRIVE.EXE—Manages the disk cache and double buffering for SCSI drives • HIMEM.SYS—Provides access to extended memory • EMM386.EXE—Manages the upper memory area and creates expanded memory from extended memory • Application programs—Application program software interfaces with DOS to use the PC hardware to perform useful work for us. It is through the application program that we see the PC. Under DOS, the application program may have its own device drivers and command interpreter functions. Applications are typically a single large program loaded entirely into memory along with the data being worked upon. DOS as an operating system runs one program at a time.