Versions and standards for UNIX operating systems

From the development of the UNIX operating system, it can be known that there are variations and versions between UNIX systems. As UNIX is being used by a growing number of businesses and governments, the need for a unified standard for UNIX systems is not only easy to use for UNIX users and developers, but also for the open development of UNIX systems.

The Association of Electrical and Electronic Engineers (Ieee,institute of Electrical and Electronic engineers) established the corresponding series of standard committees for the development of "operating system interface standards for industrial use based on UNIX operating systems". In Europe, the X/open organization brings together a variety of UNIX standards, including the newly researched universal Open Systems Environment (Cose,common Open System environment). X/open published a series of specifications, always known as the X/open Portability,motif user interface is one of the widely used standards.

Some business groups have also negotiated the standards of UNIX and have produced some results. Here's a description of the various variants and versions of UNIX systems.

The 1.unixWare is based on SVR4, which was first developed and at&t by the development department. For some time by Novell

To be responsible for the management, now SCO company is responsible for its development and development work. UnixWare is mainly run on X86 (Intel or 100% compatible) machines.

The 2.SDI BSDI network server is a commercial version of the BSD operating system, originally designed by the University of Berkeley and

Development. BSDI inherits the BSD operating system and adds many new programs and features to it. These features make the system highly reliable for any intranet and Internet gateway. Because it supports the network well, BSDI is primarily used by ISPs (Internet service provider ──internet service Providers). BSDI can be run on all X86 (Intel or 100% compliant) machines.

3.FreeBSD and NetBSD are free versions of the BSDI network server. Many of the powerful features they contain enable

The BSD operating system has become very popular, but it lacks the technical support of any business group. If the user does not need technical support and needs a highly stable and reliable operating system for internet/intranet, then FreeBSD and NetBSD will be a better choice. FreeBSD runs on the X86 platform. NetBSD can be run on the following machines: Dec, Alpha, Amiga, Acorn riscpc, Atari, hp9000/300 Series, X86, m86k Macintosh, PowerPC, Sun SPARC Series, SUN3, Dec Vax and so on.

4.SCO's SCO OpenServer is a variant of Unix that is based on Xenix and is owned by Microsoft for its development and publishing work. SCO OpenServer is now very popular on internet/intranet and has been in use for a long time. Although it lacks many of the BSD features, Scoopenserver still occupies a place on enterprise servers. Because of its excellent technical support, it has become a choice for many companies ' commercial operating systems. SCO OpenServer also has many application support, including the ability to run Microsoft Word, Excel and other products, which has laid a solid foundation for the development of SCO OpenServer.