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THE VEST POCKETGUIDE TOINFORMATION TECHNOLOGY 2nd phần 3

Chuyển mạch kết nối của một cuộc gọi trong một mạng điện thoại thông thường VOIP mạng phải tương thích với các mạng chuyển mạch kênh thông thường, đặc biệt là công chúng phổ biến chuyển | 52 What Is Systems Software to diagnose the programming errors line by line after the execution. An example is the BASIC interpreter. A compiler has the advantage of being able to generate an executable file for later execution. This file called the object code is represented in binary code machine code . The original program is called the source code. Users only need the object code to execute the program. Therefore they do not have to compile the program every time they need to run it. The drawback is that if there are any programming errors it is very hard for the program designers to tell what went wrong. Therefore compilers are best used for programs that are fully developed and ready for the user. IBM-COMPATIBLE OPERATING SYSTEMS IBM-compatible operating systems are listed in Exhibit 4.1. The latest version of Windows Windows XP is described below. Windows XP Windows XP is an operating system introduced in 2001 from the Microsoft Windows family of operating systems the previous version of Windows being Windows Me. Microsoft called the release its most important product since Windows 95. 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 Name OS Developer Runs on OS390 formerly MVS IBM IBM mainframes OS400 IBM IBM AS 400 computers MS-DOS Microsoft PCs Windows 95 98 Me NT 2000 XP Microsoft PCs MacOS X Apple Computer Macintosh PCs Solaris SunSoft Inc. Sun computers UNIX AT T originally and other software companies Various versions for IBM Macintosh Sun and other computers Linux Linus Torvalds and other software companies PCs mainly servers NetWare Novell Usually network servers PalmOS Palm Handheld computers PDA Windows CE Microsoft Handheld computers PDA Exhibit 4.1 Popular Operating Systems Other Operating Systems 53 than previous versions of Windows. Windows XP comes in two version Home and Professional. Where as the Professional .