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UNIX(R) System Resources

"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972 
"... When BTL withdrew from the project, they needed to rewrite an operating
system (OS) in order to play space war on another smaller machine (a DEC
PDP-7 [Programmed Data Processor] with 4K memory for user
programs). The result was a system which a punning colleague called
UNICS (UNiplexed Information and Computing Service)--an
'emasculated Multics'; no one recalls whose idea the change to UNIX


These pages are intended to provide useful resources about the UNIX as well as other Free and Open Source (FAOS) operating systems and software. For these purposes several websites and papers are mirrored. These pages will be continuously updated.

UNIX(R) is an operating system. The job of an operating system is to orchestrate the various parts of the computer -- the processor, the on-board memory, the disk drives, keyboards, video monitors, etc. -- to perform useful tasks. The operating system is the master controller of the computer, the glue that holds together all the components of the system, including the administrators, programmers, and users. When you want the computer to do something for you, like start a program, copy a file, or display the contents of a directory, it is the operating system that must perform those tasks for you.

More than anything else, the operating system gives the computer its recognizable characteristics. It would be difficult to distinguish between two completely different computers, if they were running the same operating system. Conversely, two identical computers, running different operating systems, would appear completely different to the user.

UNIX(R) was created in the late 1960s, in an effort to provide a multi-user, multitasking system for use by programmers. The philosophy behind the design of UNIX was to provide simple, yet powerful utilities that could be pieced together in a flexible manner to perform a wide variety of tasks.

The UNIX(R) operating system comprises three parts: The kernel, the standard utility programs, and the system configuration files.

What about Linux?

Developed by Linus Torvalds, Linux is a product that mimics the form and function of a UNIX system, but is not derived from licensed source code. Rather, it was developed independently; by a group of developers in an informal alliance on the net. A major benefit is that the source code is freely available (under the GNU copyleft), enabling the technically astute to alter and amend the system; it also means that there are many, freely available, utilities and specialist drivers available on the net.

Recent versions of Glibc include much functionality from the Single UNIX Specification, Version 2 (for UNIX 98) and later.

What about Windows(R) NT?

Microsoft(R) Windows NT was developed as a completely new, state of the art, 32 bit operating system. As such, it has no connection with the UNIX system source code. However, market demand for POSIX.1 , POSIX.2 has led to developments by several companies of add-ons that provide partial functionality. Should the functionality meet the requirements of the UNIX brand then indeed it could become a registered UNIX system.

What about Digital(R) UNIX,   Hewlett Packard HP-UX(R),  IBM AIX(R),   SCO UnixWare(R),   SGI IRIX(R),   Sun Solaris(R) ?

These are all registered UNIX products. To see the full list of UNIX vendors and the current UNIX branded product register select here.


ANCIENT UNIX SYSTEMS ARCHIVE (including sources. Hosted by


Sites Mirrored Locally :

Some Home Pages :

Brian Dennis Ken Bill Steve Linus RMS
  Brian Kernighan    Dennis Ritchie    Ken Thompson    Bill Joy    Steve Jobs   Linus Torvalds    Richard Stallman 

You can also find here some unix people.

Some useful links :

Some links about some UNIX lawsuits :

More UNIX(R) links

UNIX(R) system is a registered trademark of The Open Group in the United States and other countries